Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 727 insertions, 0 deletions

diff --git a/media/ffvpx/libavcodec/encode.c b/media/ffvpx/libavcodec/encode.c
new file mode 100644
index 0000000000..fbe2c97cd6
--- /dev/null
+++ b/media/ffvpx/libavcodec/encode.c
@@ -0,0 +1,727 @@
+/*
+ * generic encoding-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 "libavutil/attributes.h"
+#include "libavutil/avassert.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/frame.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/internal.h"
+#include "libavutil/samplefmt.h"
+
+#include "avcodec.h"
+#include "codec_internal.h"
+#include "encode.h"
+#include "frame_thread_encoder.h"
+#include "internal.h"
+
+int ff_alloc_packet(AVCodecContext *avctx, AVPacket *avpkt, int64_t size)
+{
+    if (size < 0 || size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
+        av_log(avctx, AV_LOG_ERROR, "Invalid minimum required packet size %"PRId64" (max allowed is %d)\n",
+               size, INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE);
+        return AVERROR(EINVAL);
+    }
+
+    av_assert0(!avpkt->data);
+
+    av_fast_padded_malloc(&avctx->internal->byte_buffer,
+                          &avctx->internal->byte_buffer_size, size);
+    avpkt->data = avctx->internal->byte_buffer;
+    if (!avpkt->data) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to allocate packet of size %"PRId64"\n", size);
+        return AVERROR(ENOMEM);
+    }
+    avpkt->size = size;
+
+    return 0;
+}
+
+int avcodec_default_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int flags)
+{
+    int ret;
+
+    if (avpkt->size < 0 || avpkt->size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
+        return AVERROR(EINVAL);
+
+    if (avpkt->data || avpkt->buf) {
+        av_log(avctx, AV_LOG_ERROR, "avpkt->{data,buf} != NULL in avcodec_default_get_encode_buffer()\n");
+        return AVERROR(EINVAL);
+    }
+
+    ret = av_buffer_realloc(&avpkt->buf, avpkt->size + AV_INPUT_BUFFER_PADDING_SIZE);
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to allocate packet of size %d\n", avpkt->size);
+        return ret;
+    }
+    avpkt->data = avpkt->buf->data;
+
+    return 0;
+}
+
+int ff_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int flags)
+{
+    int ret;
+
+    if (size < 0 || size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
+        return AVERROR(EINVAL);
+
+    av_assert0(!avpkt->data && !avpkt->buf);
+
+    avpkt->size = size;
+    ret = avctx->get_encode_buffer(avctx, avpkt, flags);
+    if (ret < 0)
+        goto fail;
+
+    if (!avpkt->data || !avpkt->buf) {
+        av_log(avctx, AV_LOG_ERROR, "No buffer returned by get_encode_buffer()\n");
+        ret = AVERROR(EINVAL);
+        goto fail;
+    }
+    memset(avpkt->data + avpkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
+
+    ret = 0;
+fail:
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "get_encode_buffer() failed\n");
+        av_packet_unref(avpkt);
+    }
+
+    return ret;
+}
+
+static int encode_make_refcounted(AVCodecContext *avctx, AVPacket *avpkt)
+{
+    uint8_t *data = avpkt->data;
+    int ret;
+
+    if (avpkt->buf)
+        return 0;
+
+    avpkt->data = NULL;
+    ret = ff_get_encode_buffer(avctx, avpkt, avpkt->size, 0);
+    if (ret < 0)
+        return ret;
+    memcpy(avpkt->data, data, avpkt->size);
+
+    return 0;
+}
+
+/**
+ * Pad last frame with silence.
+ */
+static int pad_last_frame(AVCodecContext *s, AVFrame *frame, const AVFrame *src, int out_samples)
+{
+    int ret;
+
+    frame->format         = src->format;
+    frame->nb_samples     = out_samples;
+    ret = av_channel_layout_copy(&frame->ch_layout, &s->ch_layout);
+    if (ret < 0)
+        goto fail;
+    ret = av_frame_get_buffer(frame, 0);
+    if (ret < 0)
+        goto fail;
+
+    ret = av_frame_copy_props(frame, src);
+    if (ret < 0)
+        goto fail;
+
+    if ((ret = av_samples_copy(frame->extended_data, src->extended_data, 0, 0,
+                               src->nb_samples, s->ch_layout.nb_channels,
+                               s->sample_fmt)) < 0)
+        goto fail;
+    if ((ret = av_samples_set_silence(frame->extended_data, src->nb_samples,
+                                      frame->nb_samples - src->nb_samples,
+                                      s->ch_layout.nb_channels, s->sample_fmt)) < 0)
+        goto fail;
+
+    return 0;
+
+fail:
+    av_frame_unref(frame);
+    s->internal->last_audio_frame = 0;
+    return ret;
+}
+
+int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
+                            const AVSubtitle *sub)
+{
+    int ret;
+    if (sub->start_display_time) {
+        av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
+        return -1;
+    }
+
+    ret = ffcodec(avctx->codec)->cb.encode_sub(avctx, buf, buf_size, sub);
+    avctx->frame_number++;
+    return ret;
+}
+
+int ff_encode_get_frame(AVCodecContext *avctx, AVFrame *frame)
+{
+    AVCodecInternal *avci = avctx->internal;
+
+    if (avci->draining)
+        return AVERROR_EOF;
+
+    if (!avci->buffer_frame->buf[0])
+        return AVERROR(EAGAIN);
+
+    av_frame_move_ref(frame, avci->buffer_frame);
+
+    return 0;
+}
+
+int ff_encode_encode_cb(AVCodecContext *avctx, AVPacket *avpkt,
+                        AVFrame *frame, int *got_packet)
+{
+    const FFCodec *const codec = ffcodec(avctx->codec);
+    int ret;
+
+    ret = codec->cb.encode(avctx, avpkt, frame, got_packet);
+    emms_c();
+    av_assert0(ret <= 0);
+
+    if (!ret && *got_packet) {
+        if (avpkt->data) {
+            ret = encode_make_refcounted(avctx, avpkt);
+            if (ret < 0)
+                goto unref;
+            // Date returned by encoders must always be ref-counted
+            av_assert0(avpkt->buf);
+        }
+
+        // set the timestamps for the simple no-delay case
+        // encoders with delay have to set the timestamps themselves
+        if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY)) {
+            if (avpkt->pts == AV_NOPTS_VALUE)
+                avpkt->pts = frame->pts;
+
+            if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
+                if (!avpkt->duration)
+                    avpkt->duration = ff_samples_to_time_base(avctx,
+                                                              frame->nb_samples);
+            }
+        }
+
+        // dts equals pts unless there is reordering
+        // there can be no reordering if there is no encoder delay
+        if (!(avctx->codec_descriptor->props & AV_CODEC_PROP_REORDER) ||
+            !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY))
+            avpkt->dts = avpkt->pts;
+    } else {
+unref:
+        av_packet_unref(avpkt);
+    }
+#if !FF_API_THREAD_SAFE_CALLBACKS
+    if (frame)
+        av_frame_unref(frame);
+#endif
+
+    return ret;
+}
+
+static int encode_simple_internal(AVCodecContext *avctx, AVPacket *avpkt)
+{
+    AVCodecInternal   *avci = avctx->internal;
+    AVFrame          *frame = avci->in_frame;
+    const FFCodec *const codec = ffcodec(avctx->codec);
+    int got_packet;
+    int ret;
+
+    if (avci->draining_done)
+        return AVERROR_EOF;
+
+    if (!frame->buf[0] && !avci->draining) {
+        av_frame_unref(frame);
+        ret = ff_encode_get_frame(avctx, frame);
+        if (ret < 0 && ret != AVERROR_EOF)
+            return ret;
+    }
+
+    if (!frame->buf[0]) {
+        if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY ||
+              avci->frame_thread_encoder))
+            return AVERROR_EOF;
+
+        // Flushing is signaled with a NULL frame
+        frame = NULL;
+    }
+
+    got_packet = 0;
+
+    av_assert0(codec->cb_type == FF_CODEC_CB_TYPE_ENCODE);
+
+    if (CONFIG_FRAME_THREAD_ENCODER && avci->frame_thread_encoder)
+        /* This will unref frame. */
+        ret = ff_thread_video_encode_frame(avctx, avpkt, frame, &got_packet);
+    else {
+        ret = ff_encode_encode_cb(avctx, avpkt, frame, &got_packet);
+#if FF_API_THREAD_SAFE_CALLBACKS
+        if (frame)
+            av_frame_unref(frame);
+#endif
+    }
+
+    if (avci->draining && !got_packet)
+        avci->draining_done = 1;
+
+    return ret;
+}
+
+static int encode_simple_receive_packet(AVCodecContext *avctx, AVPacket *avpkt)
+{
+    int ret;
+
+    while (!avpkt->data && !avpkt->side_data) {
+        ret = encode_simple_internal(avctx, avpkt);
+        if (ret < 0)
+            return ret;
+    }
+
+    return 0;
+}
+
+static int encode_receive_packet_internal(AVCodecContext *avctx, AVPacket *avpkt)
+{
+    AVCodecInternal *avci = avctx->internal;
+    int ret;
+
+    if (avci->draining_done)
+        return AVERROR_EOF;
+
+    av_assert0(!avpkt->data && !avpkt->side_data);
+
+    if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) {
+        if ((avctx->flags & AV_CODEC_FLAG_PASS1) && avctx->stats_out)
+            avctx->stats_out[0] = '\0';
+        if (av_image_check_size2(avctx->width, avctx->height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx))
+            return AVERROR(EINVAL);
+    }
+
+    if (ffcodec(avctx->codec)->cb_type == FF_CODEC_CB_TYPE_RECEIVE_PACKET) {
+        ret = ffcodec(avctx->codec)->cb.receive_packet(avctx, avpkt);
+        if (ret < 0)
+            av_packet_unref(avpkt);
+        else
+            // Encoders must always return ref-counted buffers.
+            // Side-data only packets have no data and can be not ref-counted.
+            av_assert0(!avpkt->data || avpkt->buf);
+    } else
+        ret = encode_simple_receive_packet(avctx, avpkt);
+    if (ret >= 0)
+        avpkt->flags |= avci->intra_only_flag;
+
+    if (ret == AVERROR_EOF)
+        avci->draining_done = 1;
+
+    return ret;
+}
+
+#if CONFIG_LCMS2
+static int encode_generate_icc_profile(AVCodecContext *avctx, AVFrame *frame)
+{
+    enum AVColorTransferCharacteristic trc = frame->color_trc;
+    enum AVColorPrimaries prim = frame->color_primaries;
+    const FFCodec *const codec = ffcodec(avctx->codec);
+    AVCodecInternal *avci = avctx->internal;
+    cmsHPROFILE profile;
+    int ret;
+
+    /* don't generate ICC profiles if disabled or unsupported */
+    if (!(avctx->flags2 & AV_CODEC_FLAG2_ICC_PROFILES))
+        return 0;
+    if (!(codec->caps_internal & FF_CODEC_CAP_ICC_PROFILES))
+        return 0;
+
+    if (trc == AVCOL_TRC_UNSPECIFIED)
+        trc = avctx->color_trc;
+    if (prim == AVCOL_PRI_UNSPECIFIED)
+        prim = avctx->color_primaries;
+    if (trc == AVCOL_TRC_UNSPECIFIED || prim == AVCOL_PRI_UNSPECIFIED)
+        return 0; /* can't generate ICC profile with missing csp tags */
+
+    if (av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE))
+        return 0; /* don't overwrite existing ICC profile */
+
+    if (!avci->icc.avctx) {
+        ret = ff_icc_context_init(&avci->icc, avctx);
+        if (ret < 0)
+            return ret;
+    }
+
+    ret = ff_icc_profile_generate(&avci->icc, prim, trc, &profile);
+    if (ret < 0)
+        return ret;
+
+    ret = ff_icc_profile_attach(&avci->icc, profile, frame);
+    cmsCloseProfile(profile);
+    return ret;
+}
+#else /* !CONFIG_LCMS2 */
+static int encode_generate_icc_profile(av_unused AVCodecContext *c, av_unused AVFrame *f)
+{
+    return 0;
+}
+#endif
+
+static int encode_send_frame_internal(AVCodecContext *avctx, const AVFrame *src)
+{
+    AVCodecInternal *avci = avctx->internal;
+    AVFrame *dst = avci->buffer_frame;
+    int ret;
+
+    if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
+        /* extract audio service type metadata */
+        AVFrameSideData *sd = av_frame_get_side_data(src, AV_FRAME_DATA_AUDIO_SERVICE_TYPE);
+        if (sd && sd->size >= sizeof(enum AVAudioServiceType))
+            avctx->audio_service_type = *(enum AVAudioServiceType*)sd->data;
+
+        /* check for valid frame size */
+        if (!(avctx->codec->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE)) {
+            /* if we already got an undersized frame, that must have been the last */
+            if (avctx->internal->last_audio_frame) {
+                av_log(avctx, AV_LOG_ERROR, "frame_size (%d) was not respected for a non-last frame\n", avctx->frame_size);
+                return AVERROR(EINVAL);
+            }
+            if (src->nb_samples > avctx->frame_size) {
+                av_log(avctx, AV_LOG_ERROR, "nb_samples (%d) > frame_size (%d)\n", src->nb_samples, avctx->frame_size);
+                return AVERROR(EINVAL);
+            }
+            if (src->nb_samples < avctx->frame_size) {
+                avctx->internal->last_audio_frame = 1;
+                if (!(avctx->codec->capabilities & AV_CODEC_CAP_SMALL_LAST_FRAME)) {
+                    int pad_samples = avci->pad_samples ? avci->pad_samples : avctx->frame_size;
+                    int out_samples = (src->nb_samples + pad_samples - 1) / pad_samples * pad_samples;
+
+                    if (out_samples != src->nb_samples) {
+                        ret = pad_last_frame(avctx, dst, src, out_samples);
+                        if (ret < 0)
+                            return ret;
+                        goto finish;
+                    }
+                }
+            }
+        }
+    }
+
+    ret = av_frame_ref(dst, src);
+    if (ret < 0)
+        return ret;
+
+finish:
+
+#if FF_API_PKT_DURATION
+FF_DISABLE_DEPRECATION_WARNINGS
+    if (dst->pkt_duration && dst->pkt_duration != dst->duration)
+        dst->duration = dst->pkt_duration;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+
+    if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) {
+        ret = encode_generate_icc_profile(avctx, dst);
+        if (ret < 0)
+            return ret;
+    }
+
+    return 0;
+}
+
+int attribute_align_arg avcodec_send_frame(AVCodecContext *avctx, const AVFrame *frame)
+{
+    AVCodecInternal *avci = avctx->internal;
+    int ret;
+
+    if (!avcodec_is_open(avctx) || !av_codec_is_encoder(avctx->codec))
+        return AVERROR(EINVAL);
+
+    if (avci->draining)
+        return AVERROR_EOF;
+
+    if (avci->buffer_frame->buf[0])
+        return AVERROR(EAGAIN);
+
+    if (!frame) {
+        avci->draining = 1;
+    } else {
+        ret = encode_send_frame_internal(avctx, frame);
+        if (ret < 0)
+            return ret;
+    }
+
+    if (!avci->buffer_pkt->data && !avci->buffer_pkt->side_data) {
+        ret = encode_receive_packet_internal(avctx, avci->buffer_pkt);
+        if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
+            return ret;
+    }
+
+    avctx->frame_number++;
+
+    return 0;
+}
+
+int attribute_align_arg avcodec_receive_packet(AVCodecContext *avctx, AVPacket *avpkt)
+{
+    AVCodecInternal *avci = avctx->internal;
+    int ret;
+
+    av_packet_unref(avpkt);
+
+    if (!avcodec_is_open(avctx) || !av_codec_is_encoder(avctx->codec))
+        return AVERROR(EINVAL);
+
+    if (avci->buffer_pkt->data || avci->buffer_pkt->side_data) {
+        av_packet_move_ref(avpkt, avci->buffer_pkt);
+    } else {
+        ret = encode_receive_packet_internal(avctx, avpkt);
+        if (ret < 0)
+            return ret;
+    }
+
+    return 0;
+}
+
+static int encode_preinit_video(AVCodecContext *avctx)
+{
+    const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(avctx->pix_fmt);
+    int i;
+
+    if (avctx->codec->pix_fmts) {
+        for (i = 0; avctx->codec->pix_fmts[i] != AV_PIX_FMT_NONE; i++)
+            if (avctx->pix_fmt == avctx->codec->pix_fmts[i])
+                break;
+        if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE) {
+            char buf[128];
+            snprintf(buf, sizeof(buf), "%d", avctx->pix_fmt);
+            av_log(avctx, AV_LOG_ERROR, "Specified pixel format %s is invalid or not supported\n",
+                   (char *)av_x_if_null(av_get_pix_fmt_name(avctx->pix_fmt), buf));
+            return AVERROR(EINVAL);
+        }
+        if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ420P ||
+            avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ411P ||
+            avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ422P ||
+            avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ440P ||
+            avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ444P)
+            avctx->color_range = AVCOL_RANGE_JPEG;
+    }
+
+    if (    avctx->bits_per_raw_sample < 0
+        || (avctx->bits_per_raw_sample > 8 && pixdesc->comp[0].depth <= 8)) {
+        av_log(avctx, AV_LOG_WARNING, "Specified bit depth %d not possible with the specified pixel formats depth %d\n",
+            avctx->bits_per_raw_sample, pixdesc->comp[0].depth);
+        avctx->bits_per_raw_sample = pixdesc->comp[0].depth;
+    }
+    if (avctx->width <= 0 || avctx->height <= 0) {
+        av_log(avctx, AV_LOG_ERROR, "dimensions not set\n");
+        return AVERROR(EINVAL);
+    }
+
+    if (avctx->ticks_per_frame && avctx->time_base.num &&
+        avctx->ticks_per_frame > INT_MAX / avctx->time_base.num) {
+        av_log(avctx, AV_LOG_ERROR,
+               "ticks_per_frame %d too large for the timebase %d/%d.",
+               avctx->ticks_per_frame,
+               avctx->time_base.num,
+               avctx->time_base.den);
+        return AVERROR(EINVAL);
+    }
+
+    if (avctx->hw_frames_ctx) {
+        AVHWFramesContext *frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
+        if (frames_ctx->format != avctx->pix_fmt) {
+            av_log(avctx, AV_LOG_ERROR,
+                   "Mismatching AVCodecContext.pix_fmt and AVHWFramesContext.format\n");
+            return AVERROR(EINVAL);
+        }
+        if (avctx->sw_pix_fmt != AV_PIX_FMT_NONE &&
+            avctx->sw_pix_fmt != frames_ctx->sw_format) {
+            av_log(avctx, AV_LOG_ERROR,
+                   "Mismatching AVCodecContext.sw_pix_fmt (%s) "
+                   "and AVHWFramesContext.sw_format (%s)\n",
+                   av_get_pix_fmt_name(avctx->sw_pix_fmt),
+                   av_get_pix_fmt_name(frames_ctx->sw_format));
+            return AVERROR(EINVAL);
+        }
+        avctx->sw_pix_fmt = frames_ctx->sw_format;
+    }
+
+    return 0;
+}
+
+static int encode_preinit_audio(AVCodecContext *avctx)
+{
+    int i;
+
+    if (avctx->codec->sample_fmts) {
+        for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++) {
+            if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
+                break;
+            if (avctx->ch_layout.nb_channels == 1 &&
+                av_get_planar_sample_fmt(avctx->sample_fmt) ==
+                av_get_planar_sample_fmt(avctx->codec->sample_fmts[i])) {
+                avctx->sample_fmt = avctx->codec->sample_fmts[i];
+                break;
+            }
+        }
+        if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
+            char buf[128];
+            snprintf(buf, sizeof(buf), "%d", avctx->sample_fmt);
+            av_log(avctx, AV_LOG_ERROR, "Specified sample format %s is invalid or not supported\n",
+                   (char *)av_x_if_null(av_get_sample_fmt_name(avctx->sample_fmt), buf));
+            return AVERROR(EINVAL);
+        }
+    }
+    if (avctx->codec->supported_samplerates) {
+        for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
+            if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
+                break;
+        if (avctx->codec->supported_samplerates[i] == 0) {
+            av_log(avctx, AV_LOG_ERROR, "Specified sample rate %d is not supported\n",
+                   avctx->sample_rate);
+            return AVERROR(EINVAL);
+        }
+    }
+    if (avctx->sample_rate < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Specified sample rate %d is not supported\n",
+                avctx->sample_rate);
+        return AVERROR(EINVAL);
+    }
+    if (avctx->codec->ch_layouts) {
+        for (i = 0; avctx->codec->ch_layouts[i].nb_channels; i++) {
+            if (!av_channel_layout_compare(&avctx->ch_layout, &avctx->codec->ch_layouts[i]))
+                break;
+        }
+        if (!avctx->codec->ch_layouts[i].nb_channels) {
+            char buf[512];
+            int ret = av_channel_layout_describe(&avctx->ch_layout, buf, sizeof(buf));
+            if (ret > 0)
+                av_log(avctx, AV_LOG_ERROR, "Specified channel layout '%s' is not supported\n", buf);
+            return AVERROR(EINVAL);
+        }
+    }
+
+    if (!avctx->bits_per_raw_sample)
+        avctx->bits_per_raw_sample = 8 * av_get_bytes_per_sample(avctx->sample_fmt);
+
+    return 0;
+}
+
+int ff_encode_preinit(AVCodecContext *avctx)
+{
+    AVCodecInternal *avci = avctx->internal;
+    int ret = 0;
+
+    if (avctx->time_base.num <= 0 || avctx->time_base.den <= 0) {
+        av_log(avctx, AV_LOG_ERROR, "The encoder timebase is not set.\n");
+        return AVERROR(EINVAL);
+    }
+
+    switch (avctx->codec_type) {
+    case AVMEDIA_TYPE_VIDEO: ret = encode_preinit_video(avctx); break;
+    case AVMEDIA_TYPE_AUDIO: ret = encode_preinit_audio(avctx); break;
+    }
+    if (ret < 0)
+        return ret;
+
+    if (   (avctx->codec_type == AVMEDIA_TYPE_VIDEO || avctx->codec_type == AVMEDIA_TYPE_AUDIO)
+        && avctx->bit_rate>0 && avctx->bit_rate<1000) {
+        av_log(avctx, AV_LOG_WARNING, "Bitrate %"PRId64" is extremely low, maybe you mean %"PRId64"k\n", avctx->bit_rate, avctx->bit_rate);
+    }
+
+    if (!avctx->rc_initial_buffer_occupancy)
+        avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3LL / 4;
+
+    if (avctx->codec_descriptor->props & AV_CODEC_PROP_INTRA_ONLY)
+        avctx->internal->intra_only_flag = AV_PKT_FLAG_KEY;
+
+    if (ffcodec(avctx->codec)->cb_type == FF_CODEC_CB_TYPE_ENCODE) {
+        avci->in_frame = av_frame_alloc();
+        if (!avci->in_frame)
+            return AVERROR(ENOMEM);
+    }
+
+    if ((avctx->flags & AV_CODEC_FLAG_RECON_FRAME)) {
+        if (!(avctx->codec->capabilities & AV_CODEC_CAP_ENCODER_RECON_FRAME)) {
+            av_log(avctx, AV_LOG_ERROR, "Reconstructed frame output requested "
+                   "from an encoder not supporting it\n");
+            return AVERROR(ENOSYS);
+        }
+
+        avci->recon_frame = av_frame_alloc();
+        if (!avci->recon_frame)
+            return AVERROR(ENOMEM);
+    }
+
+    if (CONFIG_FRAME_THREAD_ENCODER) {
+        ret = ff_frame_thread_encoder_init(avctx);
+        if (ret < 0)
+            return ret;
+    }
+
+    return 0;
+}
+
+int ff_encode_alloc_frame(AVCodecContext *avctx, AVFrame *frame)
+{
+    int ret;
+
+    switch (avctx->codec->type) {
+    case AVMEDIA_TYPE_VIDEO:
+        frame->format = avctx->pix_fmt;
+        if (frame->width <= 0 || frame->height <= 0) {
+            frame->width  = FFMAX(avctx->width,  avctx->coded_width);
+            frame->height = FFMAX(avctx->height, avctx->coded_height);
+        }
+
+        break;
+    case AVMEDIA_TYPE_AUDIO:
+        frame->sample_rate = avctx->sample_rate;
+        frame->format      = avctx->sample_fmt;
+        if (!frame->ch_layout.nb_channels) {
+            ret = av_channel_layout_copy(&frame->ch_layout, &avctx->ch_layout);
+            if (ret < 0)
+                return ret;
+        }
+        break;
+    }
+
+    ret = avcodec_default_get_buffer2(avctx, frame, 0);
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+        av_frame_unref(frame);
+        return ret;
+    }
+
+    return 0;
+}
+
+int ff_encode_receive_frame(AVCodecContext *avctx, AVFrame *frame)
+{
+    AVCodecInternal *avci = avctx->internal;
+
+    if (!avci->recon_frame)
+        return AVERROR(EINVAL);
+    if (!avci->recon_frame->buf[0])
+        return avci->draining_done ? AVERROR_EOF : AVERROR(EAGAIN);
+
+    av_frame_move_ref(frame, avci->recon_frame);
+    return 0;
+}