diff options
Diffstat (limited to '')
| -rw-r--r-- | media/ffvpx/libavcodec/decode.c | 2062 |
1 files changed, 2062 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/decode.c b/media/ffvpx/libavcodec/decode.c new file mode 100644 index 0000000000..6c31166ec2 --- /dev/null +++ b/media/ffvpx/libavcodec/decode.c @@ -0,0 +1,2062 @@ +/* + * generic decoding-related code + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <stdint.h> +#include <string.h> + +#include "config.h" + +#if CONFIG_ICONV +# include <iconv.h> +#endif + +#include "libavutil/avassert.h" +#include "libavutil/avstring.h" +#include "libavutil/bprint.h" +#include "libavutil/common.h" +#include "libavutil/frame.h" +#include "libavutil/hwcontext.h" +#include "libavutil/imgutils.h" +#include "libavutil/internal.h" +#include "libavutil/intmath.h" +#include "libavutil/opt.h" + +#include "avcodec.h" +#include "bytestream.h" +#include "decode.h" +#include "hwaccel.h" +#include "internal.h" +#include "thread.h" + +static int apply_param_change(AVCodecContext *avctx, const AVPacket *avpkt) +{ + int size = 0, ret; + const uint8_t *data; + uint32_t flags; + int64_t val; + + data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size); + if (!data) + return 0; + + if (!(avctx->codec->capabilities & AV_CODEC_CAP_PARAM_CHANGE)) { + av_log(avctx, AV_LOG_ERROR, "This decoder does not support parameter " + "changes, but PARAM_CHANGE side data was sent to it.\n"); + ret = AVERROR(EINVAL); + goto fail2; + } + + if (size < 4) + goto fail; + + flags = bytestream_get_le32(&data); + size -= 4; + + if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) { + if (size < 4) + goto fail; + val = bytestream_get_le32(&data); + if (val <= 0 || val > INT_MAX) { + av_log(avctx, AV_LOG_ERROR, "Invalid channel count"); + ret = AVERROR_INVALIDDATA; + goto fail2; + } + avctx->channels = val; + size -= 4; + } + if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) { + if (size < 8) + goto fail; + avctx->channel_layout = bytestream_get_le64(&data); + size -= 8; + } + if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) { + if (size < 4) + goto fail; + val = bytestream_get_le32(&data); + if (val <= 0 || val > INT_MAX) { + av_log(avctx, AV_LOG_ERROR, "Invalid sample rate"); + ret = AVERROR_INVALIDDATA; + goto fail2; + } + avctx->sample_rate = val; + size -= 4; + } + if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) { + if (size < 8) + goto fail; + avctx->width = bytestream_get_le32(&data); + avctx->height = bytestream_get_le32(&data); + size -= 8; + ret = ff_set_dimensions(avctx, avctx->width, avctx->height); + if (ret < 0) + goto fail2; + } + + return 0; +fail: + av_log(avctx, AV_LOG_ERROR, "PARAM_CHANGE side data too small.\n"); + ret = AVERROR_INVALIDDATA; +fail2: + if (ret < 0) { + av_log(avctx, AV_LOG_ERROR, "Error applying parameter changes.\n"); + if (avctx->err_recognition & AV_EF_EXPLODE) + return ret; + } + return 0; +} + +static int extract_packet_props(AVCodecInternal *avci, const AVPacket *pkt) +{ + int ret = 0; + + av_packet_unref(avci->last_pkt_props); + if (pkt) { + ret = av_packet_copy_props(avci->last_pkt_props, pkt); + if (!ret) + avci->last_pkt_props->size = pkt->size; // HACK: Needed for ff_decode_frame_props(). + } + return ret; +} + +static int unrefcount_frame(AVCodecInternal *avci, AVFrame *frame) +{ + int ret; + + /* move the original frame to our backup */ + av_frame_unref(avci->to_free); + av_frame_move_ref(avci->to_free, frame); + + /* now copy everything except the AVBufferRefs back + * note that we make a COPY of the side data, so calling av_frame_free() on + * the caller's frame will work properly */ + ret = av_frame_copy_props(frame, avci->to_free); + if (ret < 0) + return ret; + + memcpy(frame->data, avci->to_free->data, sizeof(frame->data)); + memcpy(frame->linesize, avci->to_free->linesize, sizeof(frame->linesize)); + if (avci->to_free->extended_data != avci->to_free->data) { + int planes = avci->to_free->channels; + int size = planes * sizeof(*frame->extended_data); + + if (!size) { + av_frame_unref(frame); + return AVERROR_BUG; + } + + frame->extended_data = av_malloc(size); + if (!frame->extended_data) { + av_frame_unref(frame); + return AVERROR(ENOMEM); + } + memcpy(frame->extended_data, avci->to_free->extended_data, + size); + } else + frame->extended_data = frame->data; + + frame->format = avci->to_free->format; + frame->width = avci->to_free->width; + frame->height = avci->to_free->height; + frame->channel_layout = avci->to_free->channel_layout; + frame->nb_samples = avci->to_free->nb_samples; + frame->channels = avci->to_free->channels; + + return 0; +} + +int ff_decode_bsfs_init(AVCodecContext *avctx) +{ + AVCodecInternal *avci = avctx->internal; + DecodeFilterContext *s = &avci->filter; + const char *bsfs_str; + int ret; + + if (s->nb_bsfs) + return 0; + + bsfs_str = avctx->codec->bsfs ? avctx->codec->bsfs : "null"; + while (bsfs_str && *bsfs_str) { + AVBSFContext **tmp; + const AVBitStreamFilter *filter; + char *bsf, *bsf_options_str, *bsf_name; + + bsf = av_get_token(&bsfs_str, ","); + if (!bsf) { + ret = AVERROR(ENOMEM); + goto fail; + } + bsf_name = av_strtok(bsf, "=", &bsf_options_str); + if (!bsf_name) { + av_freep(&bsf); + ret = AVERROR(ENOMEM); + goto fail; + } + + filter = av_bsf_get_by_name(bsf_name); + if (!filter) { + av_log(avctx, AV_LOG_ERROR, "A non-existing bitstream filter %s " + "requested by a decoder. This is a bug, please report it.\n", + bsf_name); + av_freep(&bsf); + ret = AVERROR_BUG; + goto fail; + } + + tmp = av_realloc_array(s->bsfs, s->nb_bsfs + 1, sizeof(*s->bsfs)); + if (!tmp) { + av_freep(&bsf); + ret = AVERROR(ENOMEM); + goto fail; + } + s->bsfs = tmp; + s->nb_bsfs++; + + ret = av_bsf_alloc(filter, &s->bsfs[s->nb_bsfs - 1]); + if (ret < 0) { + av_freep(&bsf); + goto fail; + } + + if (s->nb_bsfs == 1) { + /* We do not currently have an API for passing the input timebase into decoders, + * but no filters used here should actually need it. + * So we make up some plausible-looking number (the MPEG 90kHz timebase) */ + s->bsfs[s->nb_bsfs - 1]->time_base_in = (AVRational){ 1, 90000 }; + ret = avcodec_parameters_from_context(s->bsfs[s->nb_bsfs - 1]->par_in, + avctx); + } else { + s->bsfs[s->nb_bsfs - 1]->time_base_in = s->bsfs[s->nb_bsfs - 2]->time_base_out; + ret = avcodec_parameters_copy(s->bsfs[s->nb_bsfs - 1]->par_in, + s->bsfs[s->nb_bsfs - 2]->par_out); + } + if (ret < 0) { + av_freep(&bsf); + goto fail; + } + + if (bsf_options_str && filter->priv_class) { + const AVOption *opt = av_opt_next(s->bsfs[s->nb_bsfs - 1]->priv_data, NULL); + const char * shorthand[2] = {NULL}; + + if (opt) + shorthand[0] = opt->name; + + ret = av_opt_set_from_string(s->bsfs[s->nb_bsfs - 1]->priv_data, bsf_options_str, shorthand, "=", ":"); + if (ret < 0) { + if (ret != AVERROR(ENOMEM)) { + av_log(avctx, AV_LOG_ERROR, "Invalid options for bitstream filter %s " + "requested by the decoder. This is a bug, please report it.\n", + bsf_name); + ret = AVERROR_BUG; + } + av_freep(&bsf); + goto fail; + } + } + av_freep(&bsf); + + ret = av_bsf_init(s->bsfs[s->nb_bsfs - 1]); + if (ret < 0) + goto fail; + + if (*bsfs_str) + bsfs_str++; + } + + return 0; +fail: + ff_decode_bsfs_uninit(avctx); + return ret; +} + +/* try to get one output packet from the filter chain */ +static int bsfs_poll(AVCodecContext *avctx, AVPacket *pkt) +{ + DecodeFilterContext *s = &avctx->internal->filter; + int idx, ret; + + /* start with the last filter in the chain */ + idx = s->nb_bsfs - 1; + while (idx >= 0) { + /* request a packet from the currently selected filter */ + ret = av_bsf_receive_packet(s->bsfs[idx], pkt); + if (ret == AVERROR(EAGAIN)) { + /* no packets available, try the next filter up the chain */ + ret = 0; + idx--; + continue; + } else if (ret < 0 && ret != AVERROR_EOF) { + return ret; + } + + /* got a packet or EOF -- pass it to the caller or to the next filter + * down the chain */ + if (idx == s->nb_bsfs - 1) { + return ret; + } else { + idx++; + ret = av_bsf_send_packet(s->bsfs[idx], ret < 0 ? NULL : pkt); + if (ret < 0) { + av_log(avctx, AV_LOG_ERROR, + "Error pre-processing a packet before decoding\n"); + av_packet_unref(pkt); + return ret; + } + } + } + + return AVERROR(EAGAIN); +} + +int ff_decode_get_packet(AVCodecContext *avctx, AVPacket *pkt) +{ + AVCodecInternal *avci = avctx->internal; + int ret; + + if (avci->draining) + return AVERROR_EOF; + + ret = bsfs_poll(avctx, pkt); + if (ret == AVERROR_EOF) + avci->draining = 1; + if (ret < 0) + return ret; + + ret = extract_packet_props(avctx->internal, pkt); + if (ret < 0) + goto finish; + + ret = apply_param_change(avctx, pkt); + if (ret < 0) + goto finish; + + if (avctx->codec->receive_frame) + avci->compat_decode_consumed += pkt->size; + + return 0; +finish: + av_packet_unref(pkt); + return ret; +} + +/** + * Attempt to guess proper monotonic timestamps for decoded video frames + * which might have incorrect times. Input timestamps may wrap around, in + * which case the output will as well. + * + * @param pts the pts field of the decoded AVPacket, as passed through + * AVFrame.pts + * @param dts the dts field of the decoded AVPacket + * @return one of the input values, may be AV_NOPTS_VALUE + */ +static int64_t guess_correct_pts(AVCodecContext *ctx, + int64_t reordered_pts, int64_t dts) +{ + int64_t pts = AV_NOPTS_VALUE; + + if (dts != AV_NOPTS_VALUE) { + ctx->pts_correction_num_faulty_dts += dts <= ctx->pts_correction_last_dts; + ctx->pts_correction_last_dts = dts; + } else if (reordered_pts != AV_NOPTS_VALUE) + ctx->pts_correction_last_dts = reordered_pts; + + if (reordered_pts != AV_NOPTS_VALUE) { + ctx->pts_correction_num_faulty_pts += reordered_pts <= ctx->pts_correction_last_pts; + ctx->pts_correction_last_pts = reordered_pts; + } else if(dts != AV_NOPTS_VALUE) + ctx->pts_correction_last_pts = dts; + + if ((ctx->pts_correction_num_faulty_pts<=ctx->pts_correction_num_faulty_dts || dts == AV_NOPTS_VALUE) + && reordered_pts != AV_NOPTS_VALUE) + pts = reordered_pts; + else + pts = dts; + + return pts; +} + +/* + * The core of the receive_frame_wrapper for the decoders implementing + * the simple API. Certain decoders might consume partial packets without + * returning any output, so this function needs to be called in a loop until it + * returns EAGAIN. + **/ +static int decode_simple_internal(AVCodecContext *avctx, AVFrame *frame) +{ + AVCodecInternal *avci = avctx->internal; + DecodeSimpleContext *ds = &avci->ds; + AVPacket *pkt = ds->in_pkt; + // copy to ensure we do not change pkt + int got_frame, actual_got_frame; + int ret; + + if (!pkt->data && !avci->draining) { + av_packet_unref(pkt); + ret = ff_decode_get_packet(avctx, pkt); + if (ret < 0 && ret != AVERROR_EOF) + return ret; + } + + // Some codecs (at least wma lossless) will crash when feeding drain packets + // after EOF was signaled. + if (avci->draining_done) + return AVERROR_EOF; + + if (!pkt->data && + !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY || + avctx->active_thread_type & FF_THREAD_FRAME)) + return AVERROR_EOF; + + got_frame = 0; + + if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME) { + ret = ff_thread_decode_frame(avctx, frame, &got_frame, pkt); + } else { + ret = avctx->codec->decode(avctx, frame, &got_frame, pkt); + + if (!(avctx->codec->caps_internal & FF_CODEC_CAP_SETS_PKT_DTS)) + frame->pkt_dts = pkt->dts; + if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) { + if(!avctx->has_b_frames) + frame->pkt_pos = pkt->pos; + //FIXME these should be under if(!avctx->has_b_frames) + /* get_buffer is supposed to set frame parameters */ + if (!(avctx->codec->capabilities & AV_CODEC_CAP_DR1)) { + if (!frame->sample_aspect_ratio.num) frame->sample_aspect_ratio = avctx->sample_aspect_ratio; + if (!frame->width) frame->width = avctx->width; + if (!frame->height) frame->height = avctx->height; + if (frame->format == AV_PIX_FMT_NONE) frame->format = avctx->pix_fmt; + } + } + } + emms_c(); + actual_got_frame = got_frame; + + if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) { + if (frame->flags & AV_FRAME_FLAG_DISCARD) + got_frame = 0; + if (got_frame) + frame->best_effort_timestamp = guess_correct_pts(avctx, + frame->pts, + frame->pkt_dts); + } else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) { + uint8_t *side; + int side_size; + uint32_t discard_padding = 0; + uint8_t skip_reason = 0; + uint8_t discard_reason = 0; + + if (ret >= 0 && got_frame) { + frame->best_effort_timestamp = guess_correct_pts(avctx, + frame->pts, + frame->pkt_dts); + if (frame->format == AV_SAMPLE_FMT_NONE) + frame->format = avctx->sample_fmt; + if (!frame->channel_layout) + frame->channel_layout = avctx->channel_layout; + if (!frame->channels) + frame->channels = avctx->channels; + if (!frame->sample_rate) + frame->sample_rate = avctx->sample_rate; + } + + side= av_packet_get_side_data(avci->last_pkt_props, AV_PKT_DATA_SKIP_SAMPLES, &side_size); + if(side && side_size>=10) { + avctx->internal->skip_samples = AV_RL32(side) * avctx->internal->skip_samples_multiplier; + discard_padding = AV_RL32(side + 4); + av_log(avctx, AV_LOG_DEBUG, "skip %d / discard %d samples due to side data\n", + avctx->internal->skip_samples, (int)discard_padding); + skip_reason = AV_RL8(side + 8); + discard_reason = AV_RL8(side + 9); + } + + if ((frame->flags & AV_FRAME_FLAG_DISCARD) && got_frame && + !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) { + avctx->internal->skip_samples = FFMAX(0, avctx->internal->skip_samples - frame->nb_samples); + got_frame = 0; + } + + if (avctx->internal->skip_samples > 0 && got_frame && + !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) { + if(frame->nb_samples <= avctx->internal->skip_samples){ + got_frame = 0; + avctx->internal->skip_samples -= frame->nb_samples; + av_log(avctx, AV_LOG_DEBUG, "skip whole frame, skip left: %d\n", + avctx->internal->skip_samples); + } else { + av_samples_copy(frame->extended_data, frame->extended_data, 0, avctx->internal->skip_samples, + frame->nb_samples - avctx->internal->skip_samples, avctx->channels, frame->format); + if(avctx->pkt_timebase.num && avctx->sample_rate) { + int64_t diff_ts = av_rescale_q(avctx->internal->skip_samples, + (AVRational){1, avctx->sample_rate}, + avctx->pkt_timebase); + if(frame->pts!=AV_NOPTS_VALUE) + frame->pts += diff_ts; +#if FF_API_PKT_PTS +FF_DISABLE_DEPRECATION_WARNINGS + if(frame->pkt_pts!=AV_NOPTS_VALUE) + frame->pkt_pts += diff_ts; +FF_ENABLE_DEPRECATION_WARNINGS +#endif + if(frame->pkt_dts!=AV_NOPTS_VALUE) + frame->pkt_dts += diff_ts; + if (frame->pkt_duration >= diff_ts) + frame->pkt_duration -= diff_ts; + } else { + av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for skipped samples.\n"); + } + av_log(avctx, AV_LOG_DEBUG, "skip %d/%d samples\n", + avctx->internal->skip_samples, frame->nb_samples); + frame->nb_samples -= avctx->internal->skip_samples; + avctx->internal->skip_samples = 0; + } + } + + if (discard_padding > 0 && discard_padding <= frame->nb_samples && got_frame && + !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) { + if (discard_padding == frame->nb_samples) { + got_frame = 0; + } else { + if(avctx->pkt_timebase.num && avctx->sample_rate) { + int64_t diff_ts = av_rescale_q(frame->nb_samples - discard_padding, + (AVRational){1, avctx->sample_rate}, + avctx->pkt_timebase); + frame->pkt_duration = diff_ts; + } else { + av_log(avctx, AV_LOG_WARNING, "Could not update timestamps for discarded samples.\n"); + } + av_log(avctx, AV_LOG_DEBUG, "discard %d/%d samples\n", + (int)discard_padding, frame->nb_samples); + frame->nb_samples -= discard_padding; + } + } + + if ((avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL) && got_frame) { + AVFrameSideData *fside = av_frame_new_side_data(frame, AV_FRAME_DATA_SKIP_SAMPLES, 10); + if (fside) { + AV_WL32(fside->data, avctx->internal->skip_samples); + AV_WL32(fside->data + 4, discard_padding); + AV_WL8(fside->data + 8, skip_reason); + AV_WL8(fside->data + 9, discard_reason); + avctx->internal->skip_samples = 0; + } + } + } + + if (avctx->codec->type == AVMEDIA_TYPE_AUDIO && + !avci->showed_multi_packet_warning && + ret >= 0 && ret != pkt->size && !(avctx->codec->capabilities & AV_CODEC_CAP_SUBFRAMES)) { + av_log(avctx, AV_LOG_WARNING, "Multiple frames in a packet.\n"); + avci->showed_multi_packet_warning = 1; + } + + if (!got_frame) + av_frame_unref(frame); + + if (ret >= 0 && avctx->codec->type == AVMEDIA_TYPE_VIDEO && !(avctx->flags & AV_CODEC_FLAG_TRUNCATED)) + ret = pkt->size; + +#if FF_API_AVCTX_TIMEBASE + if (avctx->framerate.num > 0 && avctx->framerate.den > 0) + avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1})); +#endif + + /* do not stop draining when actual_got_frame != 0 or ret < 0 */ + /* got_frame == 0 but actual_got_frame != 0 when frame is discarded */ + if (avctx->internal->draining && !actual_got_frame) { + if (ret < 0) { + /* prevent infinite loop if a decoder wrongly always return error on draining */ + /* reasonable nb_errors_max = maximum b frames + thread count */ + int nb_errors_max = 20 + (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME ? + avctx->thread_count : 1); + + if (avci->nb_draining_errors++ >= nb_errors_max) { + av_log(avctx, AV_LOG_ERROR, "Too many errors when draining, this is a bug. " + "Stop draining and force EOF.\n"); + avci->draining_done = 1; + ret = AVERROR_BUG; + } + } else { + avci->draining_done = 1; + } + } + + avci->compat_decode_consumed += ret; + + if (ret >= pkt->size || ret < 0) { + av_packet_unref(pkt); + } else { + int consumed = ret; + + pkt->data += consumed; + pkt->size -= consumed; + avci->last_pkt_props->size -= consumed; // See extract_packet_props() comment. + pkt->pts = AV_NOPTS_VALUE; + pkt->dts = AV_NOPTS_VALUE; + avci->last_pkt_props->pts = AV_NOPTS_VALUE; + avci->last_pkt_props->dts = AV_NOPTS_VALUE; + } + + if (got_frame) + av_assert0(frame->buf[0]); + + return ret < 0 ? ret : 0; +} + +static int decode_simple_receive_frame(AVCodecContext *avctx, AVFrame *frame) +{ + int ret; + + while (!frame->buf[0]) { + ret = decode_simple_internal(avctx, frame); + if (ret < 0) + return ret; + } + + return 0; +} + +static int decode_receive_frame_internal(AVCodecContext *avctx, AVFrame *frame) +{ + AVCodecInternal *avci = avctx->internal; + int ret; + + av_assert0(!frame->buf[0]); + + if (avctx->codec->receive_frame) + ret = avctx->codec->receive_frame(avctx, frame); + else + ret = decode_simple_receive_frame(avctx, frame); + + if (ret == AVERROR_EOF) + avci->draining_done = 1; + + if (!ret) { + /* the only case where decode data is not set should be decoders + * that do not call ff_get_buffer() */ + av_assert0((frame->private_ref && frame->private_ref->size == sizeof(FrameDecodeData)) || + !(avctx->codec->capabilities & AV_CODEC_CAP_DR1)); + + if (frame->private_ref) { + FrameDecodeData *fdd = (FrameDecodeData*)frame->private_ref->data; + + if (fdd->post_process) { + ret = fdd->post_process(avctx, frame); + if (ret < 0) { + av_frame_unref(frame); + return ret; + } + } + } + } + + /* free the per-frame decode data */ + av_buffer_unref(&frame->private_ref); + + return ret; +} + +int attribute_align_arg avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt) +{ + AVCodecInternal *avci = avctx->internal; + int ret; + + if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec)) + return AVERROR(EINVAL); + + if (avctx->internal->draining) + return AVERROR_EOF; + + if (avpkt && !avpkt->size && avpkt->data) + return AVERROR(EINVAL); + + av_packet_unref(avci->buffer_pkt); + if (avpkt && (avpkt->data || avpkt->side_data_elems)) { + ret = av_packet_ref(avci->buffer_pkt, avpkt); + if (ret < 0) + return ret; + } + + ret = av_bsf_send_packet(avci->filter.bsfs[0], avci->buffer_pkt); + if (ret < 0) { + av_packet_unref(avci->buffer_pkt); + return ret; + } + + if (!avci->buffer_frame->buf[0]) { + ret = decode_receive_frame_internal(avctx, avci->buffer_frame); + if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) + return ret; + } + + return 0; +} + +static int apply_cropping(AVCodecContext *avctx, AVFrame *frame) +{ + /* make sure we are noisy about decoders returning invalid cropping data */ + if (frame->crop_left >= INT_MAX - frame->crop_right || + frame->crop_top >= INT_MAX - frame->crop_bottom || + (frame->crop_left + frame->crop_right) >= frame->width || + (frame->crop_top + frame->crop_bottom) >= frame->height) { + av_log(avctx, AV_LOG_WARNING, + "Invalid cropping information set by a decoder: " + "%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER"/%"SIZE_SPECIFIER" " + "(frame size %dx%d). This is a bug, please report it\n", + frame->crop_left, frame->crop_right, frame->crop_top, frame->crop_bottom, + frame->width, frame->height); + frame->crop_left = 0; + frame->crop_right = 0; + frame->crop_top = 0; + frame->crop_bottom = 0; + return 0; + } + + if (!avctx->apply_cropping) + return 0; + + return av_frame_apply_cropping(frame, avctx->flags & AV_CODEC_FLAG_UNALIGNED ? + AV_FRAME_CROP_UNALIGNED : 0); +} + +int attribute_align_arg avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame) +{ + AVCodecInternal *avci = avctx->internal; + int ret, changed; + + av_frame_unref(frame); + + if (!avcodec_is_open(avctx) || !av_codec_is_decoder(avctx->codec)) + return AVERROR(EINVAL); + + if (avci->buffer_frame->buf[0]) { + av_frame_move_ref(frame, avci->buffer_frame); + } else { + ret = decode_receive_frame_internal(avctx, frame); + if (ret < 0) + return ret; + } + + if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { + ret = apply_cropping(avctx, frame); + if (ret < 0) { + av_frame_unref(frame); + return ret; + } + } + + avctx->frame_number++; + + if (avctx->flags & AV_CODEC_FLAG_DROPCHANGED) { + + if (avctx->frame_number == 1) { + avci->initial_format = frame->format; + switch(avctx->codec_type) { + case AVMEDIA_TYPE_VIDEO: + avci->initial_width = frame->width; + avci->initial_height = frame->height; + break; + case AVMEDIA_TYPE_AUDIO: + avci->initial_sample_rate = frame->sample_rate ? frame->sample_rate : + avctx->sample_rate; + avci->initial_channels = frame->channels; + avci->initial_channel_layout = frame->channel_layout; + break; + } + } + + if (avctx->frame_number > 1) { + changed = avci->initial_format != frame->format; + + switch(avctx->codec_type) { + case AVMEDIA_TYPE_VIDEO: + changed |= avci->initial_width != frame->width || + avci->initial_height != frame->height; + break; + case AVMEDIA_TYPE_AUDIO: + changed |= avci->initial_sample_rate != frame->sample_rate || + avci->initial_sample_rate != avctx->sample_rate || + avci->initial_channels != frame->channels || + avci->initial_channel_layout != frame->channel_layout; + break; + } + + if (changed) { + avci->changed_frames_dropped++; + av_log(avctx, AV_LOG_INFO, "dropped changed frame #%d pts %"PRId64 + " drop count: %d \n", + avctx->frame_number, frame->pts, + avci->changed_frames_dropped); + av_frame_unref(frame); + return AVERROR_INPUT_CHANGED; + } + } + } + return 0; +} + +static int compat_decode(AVCodecContext *avctx, AVFrame *frame, + int *got_frame, const AVPacket *pkt) +{ + AVCodecInternal *avci = avctx->internal; + int ret = 0; + + av_assert0(avci->compat_decode_consumed == 0); + + if (avci->draining_done && pkt && pkt->size != 0) { + av_log(avctx, AV_LOG_WARNING, "Got unexpected packet after EOF\n"); + avcodec_flush_buffers(avctx); + } + + *got_frame = 0; + avci->compat_decode = 1; + + if (avci->compat_decode_partial_size > 0 && + avci->compat_decode_partial_size != pkt->size) { + av_log(avctx, AV_LOG_ERROR, + "Got unexpected packet size after a partial decode\n"); + ret = AVERROR(EINVAL); + goto finish; + } + + if (!avci->compat_decode_partial_size) { + ret = avcodec_send_packet(avctx, pkt); + if (ret == AVERROR_EOF) + ret = 0; + else if (ret == AVERROR(EAGAIN)) { + /* we fully drain all the output in each decode call, so this should not + * ever happen */ + ret = AVERROR_BUG; + goto finish; + } else if (ret < 0) + goto finish; + } + + while (ret >= 0) { + ret = avcodec_receive_frame(avctx, frame); + if (ret < 0) { + if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) + ret = 0; + goto finish; + } + + if (frame != avci->compat_decode_frame) { + if (!avctx->refcounted_frames) { + ret = unrefcount_frame(avci, frame); + if (ret < 0) + goto finish; + } + + *got_frame = 1; + frame = avci->compat_decode_frame; + } else { + if (!avci->compat_decode_warned) { + av_log(avctx, AV_LOG_WARNING, "The deprecated avcodec_decode_* " + "API cannot return all the frames for this decoder. " + "Some frames will be dropped. Update your code to the " + "new decoding API to fix this.\n"); + avci->compat_decode_warned = 1; + } + } + + if (avci->draining || (!avctx->codec->bsfs && avci->compat_decode_consumed < pkt->size)) + break; + } + +finish: + if (ret == 0) { + /* if there are any bsfs then assume full packet is always consumed */ + if (avctx->codec->bsfs) + ret = pkt->size; + else + ret = FFMIN(avci->compat_decode_consumed, pkt->size); + } + avci->compat_decode_consumed = 0; + avci->compat_decode_partial_size = (ret >= 0) ? pkt->size - ret : 0; + + return ret; +} + +int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture, + int *got_picture_ptr, + const AVPacket *avpkt) +{ + return compat_decode(avctx, picture, got_picture_ptr, avpkt); +} + +int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx, + AVFrame *frame, + int *got_frame_ptr, + const AVPacket *avpkt) +{ + return compat_decode(avctx, frame, got_frame_ptr, avpkt); +} + +static void get_subtitle_defaults(AVSubtitle *sub) +{ + memset(sub, 0, sizeof(*sub)); + sub->pts = AV_NOPTS_VALUE; +} + +#define UTF8_MAX_BYTES 4 /* 5 and 6 bytes sequences should not be used */ +static int recode_subtitle(AVCodecContext *avctx, + AVPacket *outpkt, const AVPacket *inpkt) +{ +#if CONFIG_ICONV + iconv_t cd = (iconv_t)-1; + int ret = 0; + char *inb, *outb; + size_t inl, outl; + AVPacket tmp; +#endif + + if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_PRE_DECODER || inpkt->size == 0) + return 0; + +#if CONFIG_ICONV + cd = iconv_open("UTF-8", avctx->sub_charenc); + av_assert0(cd != (iconv_t)-1); + + inb = inpkt->data; + inl = inpkt->size; + + if (inl >= INT_MAX / UTF8_MAX_BYTES - AV_INPUT_BUFFER_PADDING_SIZE) { + av_log(avctx, AV_LOG_ERROR, "Subtitles packet is too big for recoding\n"); + ret = AVERROR(ENOMEM); + goto end; + } + + ret = av_new_packet(&tmp, inl * UTF8_MAX_BYTES); + if (ret < 0) + goto end; + outpkt->buf = tmp.buf; + outpkt->data = tmp.data; + outpkt->size = tmp.size; + outb = outpkt->data; + outl = outpkt->size; + + if (iconv(cd, &inb, &inl, &outb, &outl) == (size_t)-1 || + iconv(cd, NULL, NULL, &outb, &outl) == (size_t)-1 || + outl >= outpkt->size || inl != 0) { + ret = FFMIN(AVERROR(errno), -1); + av_log(avctx, AV_LOG_ERROR, "Unable to recode subtitle event \"%s\" " + "from %s to UTF-8\n", inpkt->data, avctx->sub_charenc); + av_packet_unref(&tmp); + goto end; + } + outpkt->size -= outl; + memset(outpkt->data + outpkt->size, 0, outl); + +end: + if (cd != (iconv_t)-1) + iconv_close(cd); + return ret; +#else + av_log(avctx, AV_LOG_ERROR, "requesting subtitles recoding without iconv"); + return AVERROR(EINVAL); +#endif +} + +static int utf8_check(const uint8_t *str) +{ + const uint8_t *byte; + uint32_t codepoint, min; + + while (*str) { + byte = str; + GET_UTF8(codepoint, *(byte++), return 0;); + min = byte - str == 1 ? 0 : byte - str == 2 ? 0x80 : + 1 << (5 * (byte - str) - 4); + if (codepoint < min || codepoint >= 0x110000 || + codepoint == 0xFFFE /* BOM */ || + codepoint >= 0xD800 && codepoint <= 0xDFFF /* surrogates */) + return 0; + str = byte; + } + return 1; +} + +#if FF_API_ASS_TIMING +static void insert_ts(AVBPrint *buf, int ts) +{ + if (ts == -1) { + av_bprintf(buf, "9:59:59.99,"); + } else { + int h, m, s; + + h = ts/360000; ts -= 360000*h; + m = ts/ 6000; ts -= 6000*m; + s = ts/ 100; ts -= 100*s; + av_bprintf(buf, "%d:%02d:%02d.%02d,", h, m, s, ts); + } +} + +static int convert_sub_to_old_ass_form(AVSubtitle *sub, const AVPacket *pkt, AVRational tb) +{ + int i; + AVBPrint buf; + + av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); + + for (i = 0; i < sub->num_rects; i++) { + char *final_dialog; + const char *dialog; + AVSubtitleRect *rect = sub->rects[i]; + int ts_start, ts_duration = -1; + long int layer; + + if (rect->type != SUBTITLE_ASS || !strncmp(rect->ass, "Dialogue: ", 10)) + continue; + + av_bprint_clear(&buf); + + /* skip ReadOrder */ + dialog = strchr(rect->ass, ','); + if (!dialog) + continue; + dialog++; + + /* extract Layer or Marked */ + layer = strtol(dialog, (char**)&dialog, 10); + if (*dialog != ',') + continue; + dialog++; + + /* rescale timing to ASS time base (ms) */ + ts_start = av_rescale_q(pkt->pts, tb, av_make_q(1, 100)); + if (pkt->duration != -1) + ts_duration = av_rescale_q(pkt->duration, tb, av_make_q(1, 100)); + sub->end_display_time = FFMAX(sub->end_display_time, 10 * ts_duration); + + /* construct ASS (standalone file form with timestamps) string */ + av_bprintf(&buf, "Dialogue: %ld,", layer); + insert_ts(&buf, ts_start); + insert_ts(&buf, ts_duration == -1 ? -1 : ts_start + ts_duration); + av_bprintf(&buf, "%s\r\n", dialog); + + final_dialog = av_strdup(buf.str); + if (!av_bprint_is_complete(&buf) || !final_dialog) { + av_freep(&final_dialog); + av_bprint_finalize(&buf, NULL); + return AVERROR(ENOMEM); + } + av_freep(&rect->ass); + rect->ass = final_dialog; + } + + av_bprint_finalize(&buf, NULL); + return 0; +} +#endif + +int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, + int *got_sub_ptr, + AVPacket *avpkt) +{ + int i, ret = 0; + + if (!avpkt->data && avpkt->size) { + av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n"); + return AVERROR(EINVAL); + } + if (!avctx->codec) + return AVERROR(EINVAL); + if (avctx->codec->type != AVMEDIA_TYPE_SUBTITLE) { + av_log(avctx, AV_LOG_ERROR, "Invalid media type for subtitles\n"); + return AVERROR(EINVAL); + } + + *got_sub_ptr = 0; + get_subtitle_defaults(sub); + + if ((avctx->codec->capabilities & AV_CODEC_CAP_DELAY) || avpkt->size) { + AVPacket pkt_recoded = *avpkt; + + ret = recode_subtitle(avctx, &pkt_recoded, avpkt); + if (ret < 0) { + *got_sub_ptr = 0; + } else { + ret = extract_packet_props(avctx->internal, &pkt_recoded); + if (ret < 0) + return ret; + + if (avctx->pkt_timebase.num && avpkt->pts != AV_NOPTS_VALUE) + sub->pts = av_rescale_q(avpkt->pts, + avctx->pkt_timebase, AV_TIME_BASE_Q); + ret = avctx->codec->decode(avctx, sub, got_sub_ptr, &pkt_recoded); + av_assert1((ret >= 0) >= !!*got_sub_ptr && + !!*got_sub_ptr >= !!sub->num_rects); + +#if FF_API_ASS_TIMING + if (avctx->sub_text_format == FF_SUB_TEXT_FMT_ASS_WITH_TIMINGS + && *got_sub_ptr && sub->num_rects) { + const AVRational tb = avctx->pkt_timebase.num ? avctx->pkt_timebase + : avctx->time_base; + int err = convert_sub_to_old_ass_form(sub, avpkt, tb); + if (err < 0) + ret = err; + } +#endif + + if (sub->num_rects && !sub->end_display_time && avpkt->duration && + avctx->pkt_timebase.num) { + AVRational ms = { 1, 1000 }; + sub->end_display_time = av_rescale_q(avpkt->duration, + avctx->pkt_timebase, ms); + } + + if (avctx->codec_descriptor->props & AV_CODEC_PROP_BITMAP_SUB) + sub->format = 0; + else if (avctx->codec_descriptor->props & AV_CODEC_PROP_TEXT_SUB) + sub->format = 1; + + for (i = 0; i < sub->num_rects; i++) { + if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_IGNORE && + sub->rects[i]->ass && !utf8_check(sub->rects[i]->ass)) { + av_log(avctx, AV_LOG_ERROR, + "Invalid UTF-8 in decoded subtitles text; " + "maybe missing -sub_charenc option\n"); + avsubtitle_free(sub); + ret = AVERROR_INVALIDDATA; + break; + } + } + + if (avpkt->data != pkt_recoded.data) { // did we recode? + /* prevent from destroying side data from original packet */ + pkt_recoded.side_data = NULL; + pkt_recoded.side_data_elems = 0; + + av_packet_unref(&pkt_recoded); + } + } + + if (*got_sub_ptr) + avctx->frame_number++; + } + + return ret; +} + +enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *avctx, + const enum AVPixelFormat *fmt) +{ + const AVPixFmtDescriptor *desc; + const AVCodecHWConfig *config; + int i, n; + + // If a device was supplied when the codec was opened, assume that the + // user wants to use it. + if (avctx->hw_device_ctx && avctx->codec->hw_configs) { + AVHWDeviceContext *device_ctx = + (AVHWDeviceContext*)avctx->hw_device_ctx->data; + for (i = 0;; i++) { + config = &avctx->codec->hw_configs[i]->public; + if (!config) + break; + if (!(config->methods & + AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX)) + continue; + if (device_ctx->type != config->device_type) + continue; + for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) { + if (config->pix_fmt == fmt[n]) + return fmt[n]; + } + } + } + // No device or other setup, so we have to choose from things which + // don't any other external information. + + // If the last element of the list is a software format, choose it + // (this should be best software format if any exist). + for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++); + desc = av_pix_fmt_desc_get(fmt[n - 1]); + if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL)) + return fmt[n - 1]; + + // Finally, traverse the list in order and choose the first entry + // with no external dependencies (if there is no hardware configuration + // information available then this just picks the first entry). + for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++) { + for (i = 0;; i++) { + config = avcodec_get_hw_config(avctx->codec, i); + if (!config) + break; + if (config->pix_fmt == fmt[n]) + break; + } + if (!config) { + // No specific config available, so the decoder must be able + // to handle this format without any additional setup. + return fmt[n]; + } + if (config->methods & AV_CODEC_HW_CONFIG_METHOD_INTERNAL) { + // Usable with only internal setup. + return fmt[n]; + } + } + + // Nothing is usable, give up. + return AV_PIX_FMT_NONE; +} + +int ff_decode_get_hw_frames_ctx(AVCodecContext *avctx, + enum AVHWDeviceType dev_type) +{ + AVHWDeviceContext *device_ctx; + AVHWFramesContext *frames_ctx; + int ret; + + if (!avctx->hwaccel) + return AVERROR(ENOSYS); + + if (avctx->hw_frames_ctx) + return 0; + if (!avctx->hw_device_ctx) { + av_log(avctx, AV_LOG_ERROR, "A hardware frames or device context is " + "required for hardware accelerated decoding.\n"); + return AVERROR(EINVAL); + } + + device_ctx = (AVHWDeviceContext *)avctx->hw_device_ctx->data; + if (device_ctx->type != dev_type) { + av_log(avctx, AV_LOG_ERROR, "Device type %s expected for hardware " + "decoding, but got %s.\n", av_hwdevice_get_type_name(dev_type), + av_hwdevice_get_type_name(device_ctx->type)); + return AVERROR(EINVAL); + } + + ret = avcodec_get_hw_frames_parameters(avctx, + avctx->hw_device_ctx, + avctx->hwaccel->pix_fmt, + &avctx->hw_frames_ctx); + if (ret < 0) + return ret; + + frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data; + + + if (frames_ctx->initial_pool_size) { + // We guarantee 4 base work surfaces. The function above guarantees 1 + // (the absolute minimum), so add the missing count. + frames_ctx->initial_pool_size += 3; + } + + ret = av_hwframe_ctx_init(avctx->hw_frames_ctx); + if (ret < 0) { + av_buffer_unref(&avctx->hw_frames_ctx); + return ret; + } + + return 0; +} + +int avcodec_get_hw_frames_parameters(AVCodecContext *avctx, + AVBufferRef *device_ref, + enum AVPixelFormat hw_pix_fmt, + AVBufferRef **out_frames_ref) +{ + AVBufferRef *frames_ref = NULL; + const AVCodecHWConfigInternal *hw_config; + const AVHWAccel *hwa; + int i, ret; + + for (i = 0;; i++) { + hw_config = avctx->codec->hw_configs[i]; + if (!hw_config) + return AVERROR(ENOENT); + if (hw_config->public.pix_fmt == hw_pix_fmt) + break; + } + + hwa = hw_config->hwaccel; + if (!hwa || !hwa->frame_params) + return AVERROR(ENOENT); + + frames_ref = av_hwframe_ctx_alloc(device_ref); + if (!frames_ref) + return AVERROR(ENOMEM); + + ret = hwa->frame_params(avctx, frames_ref); + if (ret >= 0) { + AVHWFramesContext *frames_ctx = (AVHWFramesContext*)frames_ref->data; + + if (frames_ctx->initial_pool_size) { + // If the user has requested that extra output surfaces be + // available then add them here. + if (avctx->extra_hw_frames > 0) + frames_ctx->initial_pool_size += avctx->extra_hw_frames; + + // If frame threading is enabled then an extra surface per thread + // is also required. + if (avctx->active_thread_type & FF_THREAD_FRAME) + frames_ctx->initial_pool_size += avctx->thread_count; + } + + *out_frames_ref = frames_ref; + } else { + av_buffer_unref(&frames_ref); + } + return ret; +} + +static int hwaccel_init(AVCodecContext *avctx, + const AVCodecHWConfigInternal *hw_config) +{ + const AVHWAccel *hwaccel; + int err; + + hwaccel = hw_config->hwaccel; + if (hwaccel->capabilities & AV_HWACCEL_CODEC_CAP_EXPERIMENTAL && + avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) { + av_log(avctx, AV_LOG_WARNING, "Ignoring experimental hwaccel: %s\n", + hwaccel->name); + return AVERROR_PATCHWELCOME; + } + + if (hwaccel->priv_data_size) { + avctx->internal->hwaccel_priv_data = + av_mallocz(hwaccel->priv_data_size); + if (!avctx->internal->hwaccel_priv_data) + return AVERROR(ENOMEM); + } + + avctx->hwaccel = hwaccel; + if (hwaccel->init) { + err = hwaccel->init(avctx); + if (err < 0) { + av_log(avctx, AV_LOG_ERROR, "Failed setup for format %s: " + "hwaccel initialisation returned error.\n", + av_get_pix_fmt_name(hw_config->public.pix_fmt)); + av_freep(&avctx->internal->hwaccel_priv_data); + avctx->hwaccel = NULL; + return err; + } + } + + return 0; +} + +static void hwaccel_uninit(AVCodecContext *avctx) +{ + if (avctx->hwaccel && avctx->hwaccel->uninit) + avctx->hwaccel->uninit(avctx); + + av_freep(&avctx->internal->hwaccel_priv_data); + + avctx->hwaccel = NULL; + + av_buffer_unref(&avctx->hw_frames_ctx); +} + +int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt) +{ + const AVPixFmtDescriptor *desc; + enum AVPixelFormat *choices; + enum AVPixelFormat ret, user_choice; + const AVCodecHWConfigInternal *hw_config; + const AVCodecHWConfig *config; + int i, n, err; + + // Find end of list. + for (n = 0; fmt[n] != AV_PIX_FMT_NONE; n++); + // Must contain at least one entry. + av_assert0(n >= 1); + // If a software format is available, it must be the last entry. + desc = av_pix_fmt_desc_get(fmt[n - 1]); + if (desc->flags & AV_PIX_FMT_FLAG_HWACCEL) { + // No software format is available. + } else { + avctx->sw_pix_fmt = fmt[n - 1]; + } + + choices = av_malloc_array(n + 1, sizeof(*choices)); + if (!choices) + return AV_PIX_FMT_NONE; + + memcpy(choices, fmt, (n + 1) * sizeof(*choices)); + + for (;;) { + // Remove the previous hwaccel, if there was one. + hwaccel_uninit(avctx); + + user_choice = avctx->get_format(avctx, choices); + if (user_choice == AV_PIX_FMT_NONE) { + // Explicitly chose nothing, give up. + ret = AV_PIX_FMT_NONE; + break; + } + + desc = av_pix_fmt_desc_get(user_choice); + if (!desc) { + av_log(avctx, AV_LOG_ERROR, "Invalid format returned by " + "get_format() callback.\n"); + ret = AV_PIX_FMT_NONE; + break; + } + av_log(avctx, AV_LOG_DEBUG, "Format %s chosen by get_format().\n", + desc->name); + + for (i = 0; i < n; i++) { + if (choices[i] == user_choice) + break; + } + if (i == n) { + av_log(avctx, AV_LOG_ERROR, "Invalid return from get_format(): " + "%s not in possible list.\n", desc->name); + ret = AV_PIX_FMT_NONE; + break; + } + + if (avctx->codec->hw_configs) { + for (i = 0;; i++) { + hw_config = avctx->codec->hw_configs[i]; + if (!hw_config) + break; + if (hw_config->public.pix_fmt == user_choice) + break; + } + } else { + hw_config = NULL; + } + + if (!hw_config) { + // No config available, so no extra setup required. + ret = user_choice; + break; + } + config = &hw_config->public; + + if (config->methods & + AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX && + avctx->hw_frames_ctx) { + const AVHWFramesContext *frames_ctx = + (AVHWFramesContext*)avctx->hw_frames_ctx->data; + if (frames_ctx->format != user_choice) { + av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: " + "does not match the format of the provided frames " + "context.\n", desc->name); + goto try_again; + } + } else if (config->methods & + AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX && + avctx->hw_device_ctx) { + const AVHWDeviceContext *device_ctx = + (AVHWDeviceContext*)avctx->hw_device_ctx->data; + if (device_ctx->type != config->device_type) { + av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: " + "does not match the type of the provided device " + "context.\n", desc->name); + goto try_again; + } + } else if (config->methods & + AV_CODEC_HW_CONFIG_METHOD_INTERNAL) { + // Internal-only setup, no additional configuration. + } else if (config->methods & + AV_CODEC_HW_CONFIG_METHOD_AD_HOC) { + // Some ad-hoc configuration we can't see and can't check. + } else { + av_log(avctx, AV_LOG_ERROR, "Invalid setup for format %s: " + "missing configuration.\n", desc->name); + goto try_again; + } + if (hw_config->hwaccel) { + av_log(avctx, AV_LOG_DEBUG, "Format %s requires hwaccel " + "initialisation.\n", desc->name); + err = hwaccel_init(avctx, hw_config); + if (err < 0) + goto try_again; + } + ret = user_choice; + break; + + try_again: + av_log(avctx, AV_LOG_DEBUG, "Format %s not usable, retrying " + "get_format() without it.\n", desc->name); + for (i = 0; i < n; i++) { + if (choices[i] == user_choice) + break; + } + for (; i + 1 < n; i++) + choices[i] = choices[i + 1]; + --n; + } + + av_freep(&choices); + return ret; +} + +static int update_frame_pool(AVCodecContext *avctx, AVFrame *frame) +{ + FramePool *pool = avctx->internal->pool; + int i, ret; + + switch (avctx->codec_type) { + case AVMEDIA_TYPE_VIDEO: { + uint8_t *data[4]; + int linesize[4]; + int size[4] = { 0 }; + int w = frame->width; + int h = frame->height; + int tmpsize, unaligned; + + if (pool->format == frame->format && + pool->width == frame->width && pool->height == frame->height) + return 0; + + avcodec_align_dimensions2(avctx, &w, &h, pool->stride_align); + + do { + // NOTE: do not align linesizes individually, this breaks e.g. assumptions + // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2 + ret = av_image_fill_linesizes(linesize, avctx->pix_fmt, w); + if (ret < 0) + return ret; + // increase alignment of w for next try (rhs gives the lowest bit set in w) + w += w & ~(w - 1); + + unaligned = 0; + for (i = 0; i < 4; i++) + unaligned |= linesize[i] % pool->stride_align[i]; + } while (unaligned); + + tmpsize = av_image_fill_pointers(data, avctx->pix_fmt, h, + NULL, linesize); + if (tmpsize < 0) + return tmpsize; + + for (i = 0; i < 3 && data[i + 1]; i++) + size[i] = data[i + 1] - data[i]; + size[i] = tmpsize - (data[i] - data[0]); + + for (i = 0; i < 4; i++) { + av_buffer_pool_uninit(&pool->pools[i]); + pool->linesize[i] = linesize[i]; + if (size[i]) { + pool->pools[i] = av_buffer_pool_init(size[i] + 16 + STRIDE_ALIGN - 1, + CONFIG_MEMORY_POISONING ? + NULL : + av_buffer_allocz); + if (!pool->pools[i]) { + ret = AVERROR(ENOMEM); + goto fail; + } + } + } + pool->format = frame->format; + pool->width = frame->width; + pool->height = frame->height; + + break; + } + case AVMEDIA_TYPE_AUDIO: { + int ch = frame->channels; //av_get_channel_layout_nb_channels(frame->channel_layout); + int planar = av_sample_fmt_is_planar(frame->format); + int planes = planar ? ch : 1; + + if (pool->format == frame->format && pool->planes == planes && + pool->channels == ch && frame->nb_samples == pool->samples) + return 0; + + av_buffer_pool_uninit(&pool->pools[0]); + ret = av_samples_get_buffer_size(&pool->linesize[0], ch, + frame->nb_samples, frame->format, 0); + if (ret < 0) + goto fail; + + pool->pools[0] = av_buffer_pool_init(pool->linesize[0], NULL); + if (!pool->pools[0]) { + ret = AVERROR(ENOMEM); + goto fail; + } + + pool->format = frame->format; + pool->planes = planes; + pool->channels = ch; + pool->samples = frame->nb_samples; + break; + } + default: av_assert0(0); + } + return 0; +fail: + for (i = 0; i < 4; i++) + av_buffer_pool_uninit(&pool->pools[i]); + pool->format = -1; + pool->planes = pool->channels = pool->samples = 0; + pool->width = pool->height = 0; + return ret; +} + +static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame) +{ + FramePool *pool = avctx->internal->pool; + int planes = pool->planes; + int i; + + frame->linesize[0] = pool->linesize[0]; + + if (planes > AV_NUM_DATA_POINTERS) { + frame->extended_data = av_mallocz_array(planes, sizeof(*frame->extended_data)); + frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS; + frame->extended_buf = av_mallocz_array(frame->nb_extended_buf, + sizeof(*frame->extended_buf)); + if (!frame->extended_data || !frame->extended_buf) { + av_freep(&frame->extended_data); + av_freep(&frame->extended_buf); + return AVERROR(ENOMEM); + } + } else { + frame->extended_data = frame->data; + av_assert0(frame->nb_extended_buf == 0); + } + + for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) { + frame->buf[i] = av_buffer_pool_get(pool->pools[0]); + if (!frame->buf[i]) + goto fail; + frame->extended_data[i] = frame->data[i] = frame->buf[i]->data; + } + for (i = 0; i < frame->nb_extended_buf; i++) { + frame->extended_buf[i] = av_buffer_pool_get(pool->pools[0]); + if (!frame->extended_buf[i]) + goto fail; + frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data; + } + + if (avctx->debug & FF_DEBUG_BUFFERS) + av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p", frame); + + return 0; +fail: + av_frame_unref(frame); + return AVERROR(ENOMEM); +} + +static int video_get_buffer(AVCodecContext *s, AVFrame *pic) +{ + FramePool *pool = s->internal->pool; + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pic->format); + int i; + + if (pic->data[0] || pic->data[1] || pic->data[2] || pic->data[3]) { + av_log(s, AV_LOG_ERROR, "pic->data[*]!=NULL in avcodec_default_get_buffer\n"); + return -1; + } + + if (!desc) { + av_log(s, AV_LOG_ERROR, + "Unable to get pixel format descriptor for format %s\n", + av_get_pix_fmt_name(pic->format)); + return AVERROR(EINVAL); + } + + memset(pic->data, 0, sizeof(pic->data)); + pic->extended_data = pic->data; + + for (i = 0; i < 4 && pool->pools[i]; i++) { + pic->linesize[i] = pool->linesize[i]; + + pic->buf[i] = av_buffer_pool_get(pool->pools[i]); + if (!pic->buf[i]) + goto fail; + + pic->data[i] = pic->buf[i]->data; + } + for (; i < AV_NUM_DATA_POINTERS; i++) { + pic->data[i] = NULL; + pic->linesize[i] = 0; + } + if (desc->flags & AV_PIX_FMT_FLAG_PAL || + ((desc->flags & FF_PSEUDOPAL) && pic->data[1])) + avpriv_set_systematic_pal2((uint32_t *)pic->data[1], pic->format); + + if (s->debug & FF_DEBUG_BUFFERS) + av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p\n", pic); + + return 0; +fail: + av_frame_unref(pic); + return AVERROR(ENOMEM); +} + +int avcodec_default_get_buffer2(AVCodecContext *avctx, AVFrame *frame, int flags) +{ + int ret; + + if (avctx->hw_frames_ctx) { + ret = av_hwframe_get_buffer(avctx->hw_frames_ctx, frame, 0); + frame->width = avctx->coded_width; + frame->height = avctx->coded_height; + return ret; + } + + if ((ret = update_frame_pool(avctx, frame)) < 0) + return ret; + + switch (avctx->codec_type) { + case AVMEDIA_TYPE_VIDEO: + return video_get_buffer(avctx, frame); + case AVMEDIA_TYPE_AUDIO: + return audio_get_buffer(avctx, frame); + default: + return -1; + } +} + +static int add_metadata_from_side_data(const AVPacket *avpkt, AVFrame *frame) +{ + int size; + const uint8_t *side_metadata; + + AVDictionary **frame_md = &frame->metadata; + + side_metadata = av_packet_get_side_data(avpkt, + AV_PKT_DATA_STRINGS_METADATA, &size); + return av_packet_unpack_dictionary(side_metadata, size, frame_md); +} + +int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame) +{ + const AVPacket *pkt = avctx->internal->last_pkt_props; + int i; + static const struct { + enum AVPacketSideDataType packet; + enum AVFrameSideDataType frame; + } sd[] = { + { AV_PKT_DATA_REPLAYGAIN , AV_FRAME_DATA_REPLAYGAIN }, + { AV_PKT_DATA_DISPLAYMATRIX, AV_FRAME_DATA_DISPLAYMATRIX }, + { AV_PKT_DATA_SPHERICAL, AV_FRAME_DATA_SPHERICAL }, + { AV_PKT_DATA_STEREO3D, AV_FRAME_DATA_STEREO3D }, + { AV_PKT_DATA_AUDIO_SERVICE_TYPE, AV_FRAME_DATA_AUDIO_SERVICE_TYPE }, + { AV_PKT_DATA_MASTERING_DISPLAY_METADATA, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA }, + { AV_PKT_DATA_CONTENT_LIGHT_LEVEL, AV_FRAME_DATA_CONTENT_LIGHT_LEVEL }, + { AV_PKT_DATA_A53_CC, AV_FRAME_DATA_A53_CC }, + }; + + if (pkt) { + frame->pts = pkt->pts; +#if FF_API_PKT_PTS +FF_DISABLE_DEPRECATION_WARNINGS + frame->pkt_pts = pkt->pts; +FF_ENABLE_DEPRECATION_WARNINGS +#endif + frame->pkt_pos = pkt->pos; + frame->pkt_duration = pkt->duration; + frame->pkt_size = pkt->size; + + for (i = 0; i < FF_ARRAY_ELEMS(sd); i++) { + int size; + uint8_t *packet_sd = av_packet_get_side_data(pkt, sd[i].packet, &size); + if (packet_sd) { + AVFrameSideData *frame_sd = av_frame_new_side_data(frame, + sd[i].frame, + size); + if (!frame_sd) + return AVERROR(ENOMEM); + + memcpy(frame_sd->data, packet_sd, size); + } + } + add_metadata_from_side_data(pkt, frame); + + if (pkt->flags & AV_PKT_FLAG_DISCARD) { + frame->flags |= AV_FRAME_FLAG_DISCARD; + } else { + frame->flags = (frame->flags & ~AV_FRAME_FLAG_DISCARD); + } + } + frame->reordered_opaque = avctx->reordered_opaque; + + if (frame->color_primaries == AVCOL_PRI_UNSPECIFIED) + frame->color_primaries = avctx->color_primaries; + if (frame->color_trc == AVCOL_TRC_UNSPECIFIED) + frame->color_trc = avctx->color_trc; + if (frame->colorspace == AVCOL_SPC_UNSPECIFIED) + frame->colorspace = avctx->colorspace; + if (frame->color_range == AVCOL_RANGE_UNSPECIFIED) + frame->color_range = avctx->color_range; + if (frame->chroma_location == AVCHROMA_LOC_UNSPECIFIED) + frame->chroma_location = avctx->chroma_sample_location; + + switch (avctx->codec->type) { + case AVMEDIA_TYPE_VIDEO: + frame->format = avctx->pix_fmt; + if (!frame->sample_aspect_ratio.num) + frame->sample_aspect_ratio = avctx->sample_aspect_ratio; + + if (frame->width && frame->height && + av_image_check_sar(frame->width, frame->height, + frame->sample_aspect_ratio) < 0) { + av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n", + frame->sample_aspect_ratio.num, + frame->sample_aspect_ratio.den); + frame->sample_aspect_ratio = (AVRational){ 0, 1 }; + } + + break; + case AVMEDIA_TYPE_AUDIO: + if (!frame->sample_rate) + frame->sample_rate = avctx->sample_rate; + if (frame->format < 0) + frame->format = avctx->sample_fmt; + if (!frame->channel_layout) { + if (avctx->channel_layout) { + if (av_get_channel_layout_nb_channels(avctx->channel_layout) != + avctx->channels) { + av_log(avctx, AV_LOG_ERROR, "Inconsistent channel " + "configuration.\n"); + return AVERROR(EINVAL); + } + + frame->channel_layout = avctx->channel_layout; + } else { + if (avctx->channels > FF_SANE_NB_CHANNELS) { + av_log(avctx, AV_LOG_ERROR, "Too many channels: %d.\n", + avctx->channels); + return AVERROR(ENOSYS); + } + } + } + frame->channels = avctx->channels; + break; + } + return 0; +} + +static void validate_avframe_allocation(AVCodecContext *avctx, AVFrame *frame) +{ + if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { + int i; + int num_planes = av_pix_fmt_count_planes(frame->format); + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format); + int flags = desc ? desc->flags : 0; + if (num_planes == 1 && (flags & AV_PIX_FMT_FLAG_PAL)) + num_planes = 2; + if ((flags & FF_PSEUDOPAL) && frame->data[1]) + num_planes = 2; + for (i = 0; i < num_planes; i++) { + av_assert0(frame->data[i]); + } + // For formats without data like hwaccel allow unused pointers to be non-NULL. + for (i = num_planes; num_planes > 0 && i < FF_ARRAY_ELEMS(frame->data); i++) { + if (frame->data[i]) + av_log(avctx, AV_LOG_ERROR, "Buffer returned by get_buffer2() did not zero unused plane pointers\n"); + frame->data[i] = NULL; + } + } +} + +static void decode_data_free(void *opaque, uint8_t *data) +{ + FrameDecodeData *fdd = (FrameDecodeData*)data; + + if (fdd->post_process_opaque_free) + fdd->post_process_opaque_free(fdd->post_process_opaque); + + if (fdd->hwaccel_priv_free) + fdd->hwaccel_priv_free(fdd->hwaccel_priv); + + av_freep(&fdd); +} + +int ff_attach_decode_data(AVFrame *frame) +{ + AVBufferRef *fdd_buf; + FrameDecodeData *fdd; + + av_assert1(!frame->private_ref); + av_buffer_unref(&frame->private_ref); + + fdd = av_mallocz(sizeof(*fdd)); + if (!fdd) + return AVERROR(ENOMEM); + + fdd_buf = av_buffer_create((uint8_t*)fdd, sizeof(*fdd), decode_data_free, + NULL, AV_BUFFER_FLAG_READONLY); + if (!fdd_buf) { + av_freep(&fdd); + return AVERROR(ENOMEM); + } + + frame->private_ref = fdd_buf; + + return 0; +} + +static int get_buffer_internal(AVCodecContext *avctx, AVFrame *frame, int flags) +{ + const AVHWAccel *hwaccel = avctx->hwaccel; + int override_dimensions = 1; + int ret; + + if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { + if ((ret = av_image_check_size2(FFALIGN(avctx->width, STRIDE_ALIGN), avctx->height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx)) < 0 || avctx->pix_fmt<0) { + av_log(avctx, AV_LOG_ERROR, "video_get_buffer: image parameters invalid\n"); + return AVERROR(EINVAL); + } + + if (frame->width <= 0 || frame->height <= 0) { + frame->width = FFMAX(avctx->width, AV_CEIL_RSHIFT(avctx->coded_width, avctx->lowres)); + frame->height = FFMAX(avctx->height, AV_CEIL_RSHIFT(avctx->coded_height, avctx->lowres)); + override_dimensions = 0; + } + + if (frame->data[0] || frame->data[1] || frame->data[2] || frame->data[3]) { + av_log(avctx, AV_LOG_ERROR, "pic->data[*]!=NULL in get_buffer_internal\n"); + return AVERROR(EINVAL); + } + } + ret = ff_decode_frame_props(avctx, frame); + if (ret < 0) + return ret; + + if (hwaccel) { + if (hwaccel->alloc_frame) { + ret = hwaccel->alloc_frame(avctx, frame); + goto end; + } + } else + avctx->sw_pix_fmt = avctx->pix_fmt; + + ret = avctx->get_buffer2(avctx, frame, flags); + if (ret < 0) + goto end; + + validate_avframe_allocation(avctx, frame); + + ret = ff_attach_decode_data(frame); + if (ret < 0) + goto end; + +end: + if (avctx->codec_type == AVMEDIA_TYPE_VIDEO && !override_dimensions && + !(avctx->codec->caps_internal & FF_CODEC_CAP_EXPORTS_CROPPING)) { + frame->width = avctx->width; + frame->height = avctx->height; + } + + if (ret < 0) + av_frame_unref(frame); + + return ret; +} + +int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags) +{ + int ret = get_buffer_internal(avctx, frame, flags); + if (ret < 0) { + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + frame->width = frame->height = 0; + } + return ret; +} + +static int reget_buffer_internal(AVCodecContext *avctx, AVFrame *frame) +{ + AVFrame *tmp; + int ret; + + av_assert0(avctx->codec_type == AVMEDIA_TYPE_VIDEO); + + if (frame->data[0] && (frame->width != avctx->width || frame->height != avctx->height || frame->format != avctx->pix_fmt)) { + av_log(avctx, AV_LOG_WARNING, "Picture changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s in reget buffer()\n", + frame->width, frame->height, av_get_pix_fmt_name(frame->format), avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt)); + av_frame_unref(frame); + } + + if (!frame->data[0]) + return ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF); + + if (av_frame_is_writable(frame)) + return ff_decode_frame_props(avctx, frame); + + tmp = av_frame_alloc(); + if (!tmp) + return AVERROR(ENOMEM); + + av_frame_move_ref(tmp, frame); + + ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF); + if (ret < 0) { + av_frame_free(&tmp); + return ret; + } + + av_frame_copy(frame, tmp); + av_frame_free(&tmp); + + return 0; +} + +int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame) +{ + int ret = reget_buffer_internal(avctx, frame); + if (ret < 0) + av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); + return ret; +} + +static void bsfs_flush(AVCodecContext *avctx) +{ + DecodeFilterContext *s = &avctx->internal->filter; + + for (int i = 0; i < s->nb_bsfs; i++) + av_bsf_flush(s->bsfs[i]); +} + +void avcodec_flush_buffers(AVCodecContext *avctx) +{ + avctx->internal->draining = 0; + avctx->internal->draining_done = 0; + avctx->internal->nb_draining_errors = 0; + av_frame_unref(avctx->internal->buffer_frame); + av_frame_unref(avctx->internal->compat_decode_frame); + av_packet_unref(avctx->internal->buffer_pkt); + avctx->internal->buffer_pkt_valid = 0; + + av_packet_unref(avctx->internal->ds.in_pkt); + + if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME) + ff_thread_flush(avctx); + else if (avctx->codec->flush) + avctx->codec->flush(avctx); + + avctx->pts_correction_last_pts = + avctx->pts_correction_last_dts = INT64_MIN; + + bsfs_flush(avctx); + + if (!avctx->refcounted_frames) + av_frame_unref(avctx->internal->to_free); +} + +void ff_decode_bsfs_uninit(AVCodecContext *avctx) +{ + DecodeFilterContext *s = &avctx->internal->filter; + int i; + + for (i = 0; i < s->nb_bsfs; i++) + av_bsf_free(&s->bsfs[i]); + av_freep(&s->bsfs); + s->nb_bsfs = 0; +} |