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-rw-r--r--media/ffvpx/libavcodec/decode.c1687
1 files changed, 1687 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/decode.c b/media/ffvpx/libavcodec/decode.c
new file mode 100644
index 0000000000..be2be81089
--- /dev/null
+++ b/media/ffvpx/libavcodec/decode.c
@@ -0,0 +1,1687 @@
+/*
+ * 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/channel_layout.h"
+#include "libavutil/common.h"
+#include "libavutil/fifo.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 "bsf.h"
+#include "codec_internal.h"
+#include "decode.h"
+#include "hwconfig.h"
+#include "internal.h"
+#include "thread.h"
+
+static int apply_param_change(AVCodecContext *avctx, const AVPacket *avpkt)
+{
+ int ret;
+ size_t size;
+ 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 FF_API_OLD_CHANNEL_LAYOUT
+FF_DISABLE_DEPRECATION_WARNINGS
+ 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;
+ }
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+ 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->opaque = (void *)(intptr_t)pkt->size; // Needed for ff_decode_frame_props().
+ }
+ return ret;
+}
+
+static int decode_bsfs_init(AVCodecContext *avctx)
+{
+ AVCodecInternal *avci = avctx->internal;
+ const FFCodec *const codec = ffcodec(avctx->codec);
+ int ret;
+
+ if (avci->bsf)
+ return 0;
+
+ ret = av_bsf_list_parse_str(codec->bsfs, &avci->bsf);
+ if (ret < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Error parsing decoder bitstream filters '%s': %s\n", codec->bsfs, av_err2str(ret));
+ if (ret != AVERROR(ENOMEM))
+ ret = AVERROR_BUG;
+ goto fail;
+ }
+
+ /* 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) */
+ avci->bsf->time_base_in = (AVRational){ 1, 90000 };
+ ret = avcodec_parameters_from_context(avci->bsf->par_in, avctx);
+ if (ret < 0)
+ goto fail;
+
+ ret = av_bsf_init(avci->bsf);
+ if (ret < 0)
+ goto fail;
+
+ return 0;
+fail:
+ av_bsf_free(&avci->bsf);
+ return ret;
+}
+
+int ff_decode_get_packet(AVCodecContext *avctx, AVPacket *pkt)
+{
+ AVCodecInternal *avci = avctx->internal;
+ int ret;
+
+ if (avci->draining)
+ return AVERROR_EOF;
+
+ ret = av_bsf_receive_packet(avci->bsf, pkt);
+ if (ret == AVERROR_EOF)
+ avci->draining = 1;
+ if (ret < 0)
+ return ret;
+
+ if (!(ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) {
+ ret = extract_packet_props(avctx->internal, pkt);
+ if (ret < 0)
+ goto finish;
+ }
+
+ ret = apply_param_change(avctx, pkt);
+ if (ret < 0)
+ goto finish;
+
+ 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 inline int decode_simple_internal(AVCodecContext *avctx, AVFrame *frame, int64_t *discarded_samples)
+{
+ AVCodecInternal *avci = avctx->internal;
+ AVPacket *const pkt = avci->in_pkt;
+ const FFCodec *const codec = ffcodec(avctx->codec);
+ 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 = codec->cb.decode(avctx, frame, &got_frame, pkt);
+
+ if (!(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;
+ } else if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
+ uint8_t *side;
+ size_t side_size;
+ uint32_t discard_padding = 0;
+ uint8_t skip_reason = 0;
+ uint8_t discard_reason = 0;
+
+ if (ret >= 0 && got_frame) {
+ if (frame->format == AV_SAMPLE_FMT_NONE)
+ frame->format = avctx->sample_fmt;
+ if (!frame->ch_layout.nb_channels) {
+ int ret2 = av_channel_layout_copy(&frame->ch_layout, &avctx->ch_layout);
+ if (ret2 < 0) {
+ ret = ret2;
+ got_frame = 0;
+ }
+ }
+#if FF_API_OLD_CHANNEL_LAYOUT
+FF_DISABLE_DEPRECATION_WARNINGS
+ if (!frame->channel_layout)
+ frame->channel_layout = avctx->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ?
+ avctx->ch_layout.u.mask : 0;
+ if (!frame->channels)
+ frame->channels = avctx->ch_layout.nb_channels;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+ 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) {
+ avci->skip_samples = AV_RL32(side);
+ avci->skip_samples = FFMAX(0, avci->skip_samples);
+ discard_padding = AV_RL32(side + 4);
+ av_log(avctx, AV_LOG_DEBUG, "skip %d / discard %d samples due to side data\n",
+ avci->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)) {
+ avci->skip_samples = FFMAX(0, avci->skip_samples - frame->nb_samples);
+ got_frame = 0;
+ *discarded_samples += frame->nb_samples;
+ }
+
+ if (avci->skip_samples > 0 && got_frame &&
+ !(avctx->flags2 & AV_CODEC_FLAG2_SKIP_MANUAL)) {
+ if(frame->nb_samples <= avci->skip_samples){
+ got_frame = 0;
+ *discarded_samples += frame->nb_samples;
+ avci->skip_samples -= frame->nb_samples;
+ av_log(avctx, AV_LOG_DEBUG, "skip whole frame, skip left: %d\n",
+ avci->skip_samples);
+ } else {
+ av_samples_copy(frame->extended_data, frame->extended_data, 0, avci->skip_samples,
+ frame->nb_samples - avci->skip_samples, avctx->ch_layout.nb_channels, frame->format);
+ if(avctx->pkt_timebase.num && avctx->sample_rate) {
+ int64_t diff_ts = av_rescale_q(avci->skip_samples,
+ (AVRational){1, avctx->sample_rate},
+ avctx->pkt_timebase);
+ if(frame->pts!=AV_NOPTS_VALUE)
+ frame->pts += diff_ts;
+ if(frame->pkt_dts!=AV_NOPTS_VALUE)
+ frame->pkt_dts += diff_ts;
+ if (frame->duration >= diff_ts)
+ frame->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",
+ avci->skip_samples, frame->nb_samples);
+ *discarded_samples += avci->skip_samples;
+ frame->nb_samples -= avci->skip_samples;
+ avci->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) {
+ *discarded_samples += 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->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, avci->skip_samples);
+ AV_WL32(fside->data + 4, discard_padding);
+ AV_WL8(fside->data + 8, skip_reason);
+ AV_WL8(fside->data + 9, discard_reason);
+ avci->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)
+ ret = pkt->size;
+
+ /* 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 (avci->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;
+ }
+ }
+
+ if (ret >= pkt->size || ret < 0) {
+ av_packet_unref(pkt);
+ } else {
+ int consumed = ret;
+
+ pkt->data += consumed;
+ pkt->size -= consumed;
+ pkt->pts = AV_NOPTS_VALUE;
+ pkt->dts = AV_NOPTS_VALUE;
+ if (!(codec->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) {
+ // See extract_packet_props() comment.
+ avci->last_pkt_props->opaque = (void *)((intptr_t)avci->last_pkt_props->opaque - consumed);
+ 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;
+}
+
+#if CONFIG_LCMS2
+static int detect_colorspace(AVCodecContext *avctx, AVFrame *frame)
+{
+ AVCodecInternal *avci = avctx->internal;
+ enum AVColorTransferCharacteristic trc;
+ AVColorPrimariesDesc coeffs;
+ enum AVColorPrimaries prim;
+ cmsHPROFILE profile;
+ AVFrameSideData *sd;
+ int ret;
+ if (!(avctx->flags2 & AV_CODEC_FLAG2_ICC_PROFILES))
+ return 0;
+
+ sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE);
+ if (!sd || !sd->size)
+ return 0;
+
+ if (!avci->icc.avctx) {
+ ret = ff_icc_context_init(&avci->icc, avctx);
+ if (ret < 0)
+ return ret;
+ }
+
+ profile = cmsOpenProfileFromMemTHR(avci->icc.ctx, sd->data, sd->size);
+ if (!profile)
+ return AVERROR_INVALIDDATA;
+
+ ret = ff_icc_profile_read_primaries(&avci->icc, profile, &coeffs);
+ if (!ret)
+ ret = ff_icc_profile_detect_transfer(&avci->icc, profile, &trc);
+ cmsCloseProfile(profile);
+ if (ret < 0)
+ return ret;
+
+ prim = av_csp_primaries_id_from_desc(&coeffs);
+ if (prim != AVCOL_PRI_UNSPECIFIED)
+ frame->color_primaries = prim;
+ if (trc != AVCOL_TRC_UNSPECIFIED)
+ frame->color_trc = trc;
+ return 0;
+}
+#else /* !CONFIG_LCMS2 */
+static int detect_colorspace(av_unused AVCodecContext *c, av_unused AVFrame *f)
+{
+ return 0;
+}
+#endif
+
+static int decode_simple_receive_frame(AVCodecContext *avctx, AVFrame *frame)
+{
+ int ret;
+ int64_t discarded_samples = 0;
+
+ while (!frame->buf[0]) {
+ if (discarded_samples > avctx->max_samples)
+ return AVERROR(EAGAIN);
+ ret = decode_simple_internal(avctx, frame, &discarded_samples);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int decode_receive_frame_internal(AVCodecContext *avctx, AVFrame *frame)
+{
+ AVCodecInternal *avci = avctx->internal;
+ const FFCodec *const codec = ffcodec(avctx->codec);
+ int ret, ok;
+
+ av_assert0(!frame->buf[0]);
+
+ if (codec->cb_type == FF_CODEC_CB_TYPE_RECEIVE_FRAME) {
+ ret = codec->cb.receive_frame(avctx, frame);
+ } else
+ ret = decode_simple_receive_frame(avctx, frame);
+
+ if (ret == AVERROR_EOF)
+ avci->draining_done = 1;
+
+ /* preserve ret */
+ ok = detect_colorspace(avctx, frame);
+ if (ok < 0) {
+ av_frame_unref(frame);
+ return ok;
+ }
+
+ if (!ret) {
+ frame->best_effort_timestamp = guess_correct_pts(avctx,
+ frame->pts,
+ frame->pkt_dts);
+
+#if FF_API_PKT_DURATION
+FF_DISABLE_DEPRECATION_WARNINGS
+ frame->pkt_duration = frame->duration;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+
+ /* 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->bsf, 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);
+}
+
+// make sure frames returned to the caller are valid
+static int frame_validate(AVCodecContext *avctx, AVFrame *frame)
+{
+ if (!frame->buf[0] || frame->format < 0)
+ goto fail;
+
+ switch (avctx->codec_type) {
+ case AVMEDIA_TYPE_VIDEO:
+ if (frame->width <= 0 || frame->height <= 0)
+ goto fail;
+ break;
+ case AVMEDIA_TYPE_AUDIO:
+ if (!av_channel_layout_check(&frame->ch_layout) ||
+ frame->sample_rate <= 0)
+ goto fail;
+
+ break;
+ default: av_assert0(0);
+ }
+
+ return 0;
+fail:
+ av_log(avctx, AV_LOG_ERROR, "An invalid frame was output by a decoder. "
+ "This is a bug, please report it.\n");
+ return AVERROR_BUG;
+}
+
+int ff_decode_receive_frame(AVCodecContext *avctx, AVFrame *frame)
+{
+ AVCodecInternal *avci = avctx->internal;
+ int ret, changed;
+
+ 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;
+ }
+
+ ret = frame_validate(avctx, frame);
+ if (ret < 0)
+ goto fail;
+
+ if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
+ ret = apply_cropping(avctx, frame);
+ if (ret < 0)
+ goto fail;
+ }
+
+ avctx->frame_num++;
+#if FF_API_AVCTX_FRAME_NUMBER
+FF_DISABLE_DEPRECATION_WARNINGS
+ avctx->frame_number = avctx->frame_num;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+
+ if (avctx->flags & AV_CODEC_FLAG_DROPCHANGED) {
+
+ if (avctx->frame_num == 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;
+ ret = av_channel_layout_copy(&avci->initial_ch_layout, &frame->ch_layout);
+ if (ret < 0)
+ goto fail;
+ break;
+ }
+ }
+
+ if (avctx->frame_num > 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 ||
+ av_channel_layout_compare(&avci->initial_ch_layout, &frame->ch_layout);
+ break;
+ }
+
+ if (changed) {
+ avci->changed_frames_dropped++;
+ av_log(avctx, AV_LOG_INFO, "dropped changed frame #%"PRId64" pts %"PRId64
+ " drop count: %d \n",
+ avctx->frame_num, frame->pts,
+ avci->changed_frames_dropped);
+ ret = AVERROR_INPUT_CHANGED;
+ goto fail;
+ }
+ }
+ }
+ return 0;
+fail:
+ av_frame_unref(frame);
+ return ret;
+}
+
+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, const AVPacket **outpkt,
+ const AVPacket *inpkt, AVPacket *buf_pkt)
+{
+#if CONFIG_ICONV
+ iconv_t cd = (iconv_t)-1;
+ int ret = 0;
+ char *inb, *outb;
+ size_t inl, outl;
+#endif
+
+ if (avctx->sub_charenc_mode != FF_SUB_CHARENC_MODE_PRE_DECODER || inpkt->size == 0) {
+ *outpkt = inpkt;
+ return 0;
+ }
+
+#if CONFIG_ICONV
+ 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");
+ return AVERROR(ERANGE);
+ }
+
+ cd = iconv_open("UTF-8", avctx->sub_charenc);
+ av_assert0(cd != (iconv_t)-1);
+
+ ret = av_new_packet(buf_pkt, inl * UTF8_MAX_BYTES);
+ if (ret < 0)
+ goto end;
+ ret = av_packet_copy_props(buf_pkt, inpkt);
+ if (ret < 0)
+ goto end;
+ outb = buf_pkt->data;
+ outl = buf_pkt->size;
+
+ if (iconv(cd, &inb, &inl, &outb, &outl) == (size_t)-1 ||
+ iconv(cd, NULL, NULL, &outb, &outl) == (size_t)-1 ||
+ outl >= buf_pkt->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);
+ goto end;
+ }
+ buf_pkt->size -= outl;
+ memset(buf_pkt->data + buf_pkt->size, 0, outl);
+ *outpkt = buf_pkt;
+
+ ret = 0;
+end:
+ if (ret < 0)
+ av_packet_unref(buf_pkt);
+ 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;
+}
+
+int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
+ int *got_sub_ptr, const AVPacket *avpkt)
+{
+ int 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) {
+ AVCodecInternal *avci = avctx->internal;
+ const AVPacket *pkt;
+
+ ret = recode_subtitle(avctx, &pkt, avpkt, avci->buffer_pkt);
+ 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 = ffcodec(avctx->codec)->cb.decode_sub(avctx, sub, got_sub_ptr, pkt);
+ if (pkt == avci->buffer_pkt) // did we recode?
+ av_packet_unref(avci->buffer_pkt);
+ if (ret < 0) {
+ *got_sub_ptr = 0;
+ avsubtitle_free(sub);
+ return ret;
+ }
+ av_assert1(!sub->num_rects || *got_sub_ptr);
+
+ 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 (unsigned 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);
+ *got_sub_ptr = 0;
+ return AVERROR_INVALIDDATA;
+ }
+ }
+
+ if (*got_sub_ptr)
+ avctx->frame_num++;
+#if FF_API_AVCTX_FRAME_NUMBER
+FF_DISABLE_DEPRECATION_WARNINGS
+ avctx->frame_number = avctx->frame_num;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+ }
+
+ 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 && ffcodec(avctx->codec)->hw_configs) {
+ AVHWDeviceContext *device_ctx =
+ (AVHWDeviceContext*)avctx->hw_device_ctx->data;
+ for (i = 0;; i++) {
+ config = &ffcodec(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 = ffcodec(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_memdup(fmt, (n + 1) * sizeof(*choices));
+ if (!choices)
+ return AV_PIX_FMT_NONE;
+
+ 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 (ffcodec(avctx->codec)->hw_configs) {
+ for (i = 0;; i++) {
+ hw_config = ffcodec(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 add_metadata_from_side_data(const AVPacket *avpkt, AVFrame *frame)
+{
+ size_t 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_from_pkt(const AVCodecContext *avctx,
+ AVFrame *frame, const AVPacket *pkt)
+{
+ 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 },
+ { AV_PKT_DATA_ICC_PROFILE, AV_FRAME_DATA_ICC_PROFILE },
+ { AV_PKT_DATA_S12M_TIMECODE, AV_FRAME_DATA_S12M_TIMECODE },
+ { AV_PKT_DATA_DYNAMIC_HDR10_PLUS, AV_FRAME_DATA_DYNAMIC_HDR_PLUS },
+ };
+
+ frame->pts = pkt->pts;
+ frame->pkt_pos = pkt->pos;
+ frame->duration = pkt->duration;
+ frame->pkt_size = pkt->size;
+
+ for (int i = 0; i < FF_ARRAY_ELEMS(sd); i++) {
+ size_t 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);
+ }
+
+ if (avctx->flags & AV_CODEC_FLAG_COPY_OPAQUE) {
+ int ret = av_buffer_replace(&frame->opaque_ref, pkt->opaque_ref);
+ if (ret < 0)
+ return ret;
+ frame->opaque = pkt->opaque;
+ }
+
+ return 0;
+}
+
+int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
+{
+ const AVPacket *pkt = avctx->internal->last_pkt_props;
+
+ if (!(ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_SETS_FRAME_PROPS)) {
+ int ret = ff_decode_frame_props_from_pkt(avctx, frame, pkt);
+ if (ret < 0)
+ return ret;
+ frame->pkt_size = (int)(intptr_t)pkt->opaque;
+ }
+#if FF_API_REORDERED_OPAQUE
+FF_DISABLE_DEPRECATION_WARNINGS
+ frame->reordered_opaque = avctx->reordered_opaque;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+
+ 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->ch_layout.nb_channels) {
+ int ret = av_channel_layout_copy(&frame->ch_layout, &avctx->ch_layout);
+ if (ret < 0)
+ return ret;
+ }
+#if FF_API_OLD_CHANNEL_LAYOUT
+FF_DISABLE_DEPRECATION_WARNINGS
+ frame->channels = frame->ch_layout.nb_channels;
+ frame->channel_layout = frame->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ?
+ frame->ch_layout.u.mask : 0;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+ 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;
+ 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;
+}
+
+int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
+{
+ const AVHWAccel *hwaccel = avctx->hwaccel;
+ int override_dimensions = 1;
+ int ret;
+
+ av_assert0(av_codec_is_decoder(avctx->codec));
+
+ if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
+ if ((unsigned)avctx->width > INT_MAX - STRIDE_ALIGN ||
+ (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");
+ ret = AVERROR(EINVAL);
+ goto fail;
+ }
+
+ 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");
+ ret = AVERROR(EINVAL);
+ goto fail;
+ }
+ } else if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
+#if FF_API_OLD_CHANNEL_LAYOUT
+FF_DISABLE_DEPRECATION_WARNINGS
+ /* compat layer for old-style get_buffer() implementations */
+ avctx->channels = avctx->ch_layout.nb_channels;
+ avctx->channel_layout = (avctx->ch_layout.order == AV_CHANNEL_ORDER_NATIVE) ?
+ avctx->ch_layout.u.mask : 0;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+
+ if (frame->nb_samples * (int64_t)avctx->ch_layout.nb_channels > avctx->max_samples) {
+ av_log(avctx, AV_LOG_ERROR, "samples per frame %d, exceeds max_samples %"PRId64"\n", frame->nb_samples, avctx->max_samples);
+ ret = AVERROR(EINVAL);
+ goto fail;
+ }
+ }
+ ret = ff_decode_frame_props(avctx, frame);
+ if (ret < 0)
+ goto fail;
+
+ 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 fail;
+
+ validate_avframe_allocation(avctx, frame);
+
+ ret = ff_attach_decode_data(frame);
+ if (ret < 0)
+ goto fail;
+
+end:
+ if (avctx->codec_type == AVMEDIA_TYPE_VIDEO && !override_dimensions &&
+ !(ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_EXPORTS_CROPPING)) {
+ frame->width = avctx->width;
+ frame->height = avctx->height;
+ }
+
+fail:
+ if (ret < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ av_frame_unref(frame);
+ }
+
+ return ret;
+}
+
+static int reget_buffer_internal(AVCodecContext *avctx, AVFrame *frame, int flags)
+{
+ 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 ((flags & FF_REGET_BUFFER_FLAG_READONLY) || 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 flags)
+{
+ int ret = reget_buffer_internal(avctx, frame, flags);
+ if (ret < 0)
+ av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
+ return ret;
+}
+
+int ff_decode_preinit(AVCodecContext *avctx)
+{
+ AVCodecInternal *avci = avctx->internal;
+ int ret = 0;
+
+ /* if the decoder init function was already called previously,
+ * free the already allocated subtitle_header before overwriting it */
+ av_freep(&avctx->subtitle_header);
+
+ if (avctx->codec->max_lowres < avctx->lowres || avctx->lowres < 0) {
+ av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n",
+ avctx->codec->max_lowres);
+ avctx->lowres = avctx->codec->max_lowres;
+ }
+ if (avctx->sub_charenc) {
+ if (avctx->codec_type != AVMEDIA_TYPE_SUBTITLE) {
+ av_log(avctx, AV_LOG_ERROR, "Character encoding is only "
+ "supported with subtitles codecs\n");
+ return AVERROR(EINVAL);
+ } else if (avctx->codec_descriptor->props & AV_CODEC_PROP_BITMAP_SUB) {
+ av_log(avctx, AV_LOG_WARNING, "Codec '%s' is bitmap-based, "
+ "subtitles character encoding will be ignored\n",
+ avctx->codec_descriptor->name);
+ avctx->sub_charenc_mode = FF_SUB_CHARENC_MODE_DO_NOTHING;
+ } else {
+ /* input character encoding is set for a text based subtitle
+ * codec at this point */
+ if (avctx->sub_charenc_mode == FF_SUB_CHARENC_MODE_AUTOMATIC)
+ avctx->sub_charenc_mode = FF_SUB_CHARENC_MODE_PRE_DECODER;
+
+ if (avctx->sub_charenc_mode == FF_SUB_CHARENC_MODE_PRE_DECODER) {
+#if CONFIG_ICONV
+ iconv_t cd = iconv_open("UTF-8", avctx->sub_charenc);
+ if (cd == (iconv_t)-1) {
+ ret = AVERROR(errno);
+ av_log(avctx, AV_LOG_ERROR, "Unable to open iconv context "
+ "with input character encoding \"%s\"\n", avctx->sub_charenc);
+ return ret;
+ }
+ iconv_close(cd);
+#else
+ av_log(avctx, AV_LOG_ERROR, "Character encoding subtitles "
+ "conversion needs a libavcodec built with iconv support "
+ "for this codec\n");
+ return AVERROR(ENOSYS);
+#endif
+ }
+ }
+ }
+
+ avctx->pts_correction_num_faulty_pts =
+ avctx->pts_correction_num_faulty_dts = 0;
+ avctx->pts_correction_last_pts =
+ avctx->pts_correction_last_dts = INT64_MIN;
+
+ if ( !CONFIG_GRAY && avctx->flags & AV_CODEC_FLAG_GRAY
+ && avctx->codec_descriptor->type == AVMEDIA_TYPE_VIDEO)
+ av_log(avctx, AV_LOG_WARNING,
+ "gray decoding requested but not enabled at configuration time\n");
+ if (avctx->flags2 & AV_CODEC_FLAG2_EXPORT_MVS) {
+ avctx->export_side_data |= AV_CODEC_EXPORT_DATA_MVS;
+ }
+
+ avci->in_pkt = av_packet_alloc();
+ avci->last_pkt_props = av_packet_alloc();
+ if (!avci->in_pkt || !avci->last_pkt_props)
+ return AVERROR(ENOMEM);
+
+ ret = decode_bsfs_init(avctx);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+int ff_copy_palette(void *dst, const AVPacket *src, void *logctx)
+{
+ size_t size;
+ const void *pal = av_packet_get_side_data(src, AV_PKT_DATA_PALETTE, &size);
+
+ if (pal && size == AVPALETTE_SIZE) {
+ memcpy(dst, pal, AVPALETTE_SIZE);
+ return 1;
+ } else if (pal) {
+ av_log(logctx, AV_LOG_ERROR,
+ "Palette size %"SIZE_SPECIFIER" is wrong\n", size);
+ }
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-08 03:51:32 +0000