mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-07 11:13:41 +02:00
b780b6db64
It is currently set in encode_simple_internal(), which is only called for encoders using the "simple" encoding API.
557 lines
19 KiB
C
557 lines
19 KiB
C
/*
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* generic encoding-related code
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/attributes.h"
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#include "libavutil/avassert.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/frame.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/internal.h"
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#include "libavutil/samplefmt.h"
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#include "avcodec.h"
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#include "encode.h"
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#include "frame_thread_encoder.h"
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#include "internal.h"
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int ff_alloc_packet(AVCodecContext *avctx, AVPacket *avpkt, int64_t size)
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{
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if (size < 0 || size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
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av_log(avctx, AV_LOG_ERROR, "Invalid minimum required packet size %"PRId64" (max allowed is %d)\n",
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size, INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE);
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return AVERROR(EINVAL);
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}
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av_assert0(!avpkt->data);
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av_fast_padded_malloc(&avctx->internal->byte_buffer,
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&avctx->internal->byte_buffer_size, size);
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avpkt->data = avctx->internal->byte_buffer;
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if (!avpkt->data) {
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av_log(avctx, AV_LOG_ERROR, "Failed to allocate packet of size %"PRId64"\n", size);
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return AVERROR(ENOMEM);
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}
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avpkt->size = size;
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return 0;
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}
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int avcodec_default_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int flags)
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{
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int ret;
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if (avpkt->size < 0 || avpkt->size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
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return AVERROR(EINVAL);
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if (avpkt->data || avpkt->buf) {
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av_log(avctx, AV_LOG_ERROR, "avpkt->{data,buf} != NULL in avcodec_default_get_encode_buffer()\n");
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return AVERROR(EINVAL);
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}
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ret = av_buffer_realloc(&avpkt->buf, avpkt->size + AV_INPUT_BUFFER_PADDING_SIZE);
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if (ret < 0) {
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av_log(avctx, AV_LOG_ERROR, "Failed to allocate packet of size %d\n", avpkt->size);
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return ret;
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}
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avpkt->data = avpkt->buf->data;
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return 0;
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}
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int ff_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int flags)
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{
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int ret;
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if (size < 0 || size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
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return AVERROR(EINVAL);
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av_assert0(!avpkt->data && !avpkt->buf);
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avpkt->size = size;
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ret = avctx->get_encode_buffer(avctx, avpkt, flags);
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if (ret < 0)
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goto fail;
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if (!avpkt->data || !avpkt->buf) {
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av_log(avctx, AV_LOG_ERROR, "No buffer returned by get_encode_buffer()\n");
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ret = AVERROR(EINVAL);
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goto fail;
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}
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memset(avpkt->data + avpkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
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ret = 0;
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fail:
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if (ret < 0) {
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av_log(avctx, AV_LOG_ERROR, "get_encode_buffer() failed\n");
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av_packet_unref(avpkt);
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}
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return ret;
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}
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/**
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* Pad last frame with silence.
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*/
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static int pad_last_frame(AVCodecContext *s, AVFrame *frame, const AVFrame *src)
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{
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int ret;
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frame->format = src->format;
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frame->channel_layout = src->channel_layout;
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frame->channels = src->channels;
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frame->nb_samples = s->frame_size;
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ret = av_frame_get_buffer(frame, 0);
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if (ret < 0)
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goto fail;
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ret = av_frame_copy_props(frame, src);
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if (ret < 0)
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goto fail;
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if ((ret = av_samples_copy(frame->extended_data, src->extended_data, 0, 0,
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src->nb_samples, s->channels, s->sample_fmt)) < 0)
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goto fail;
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if ((ret = av_samples_set_silence(frame->extended_data, src->nb_samples,
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frame->nb_samples - src->nb_samples,
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s->channels, s->sample_fmt)) < 0)
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goto fail;
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return 0;
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fail:
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av_frame_unref(frame);
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return ret;
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}
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int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
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const AVSubtitle *sub)
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{
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int ret;
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if (sub->start_display_time) {
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av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
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return -1;
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}
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ret = avctx->codec->encode_sub(avctx, buf, buf_size, sub);
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avctx->frame_number++;
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return ret;
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}
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int ff_encode_get_frame(AVCodecContext *avctx, AVFrame *frame)
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{
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AVCodecInternal *avci = avctx->internal;
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if (avci->draining)
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return AVERROR_EOF;
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if (!avci->buffer_frame->buf[0])
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return AVERROR(EAGAIN);
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av_frame_move_ref(frame, avci->buffer_frame);
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return 0;
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}
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static int encode_simple_internal(AVCodecContext *avctx, AVPacket *avpkt)
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{
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AVCodecInternal *avci = avctx->internal;
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EncodeSimpleContext *es = &avci->es;
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AVFrame *frame = es->in_frame;
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int got_packet;
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int ret;
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if (avci->draining_done)
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return AVERROR_EOF;
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if (!frame->buf[0] && !avci->draining) {
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av_frame_unref(frame);
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ret = ff_encode_get_frame(avctx, frame);
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if (ret < 0 && ret != AVERROR_EOF)
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return ret;
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}
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if (!frame->buf[0]) {
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if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY ||
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(avci->frame_thread_encoder && avctx->active_thread_type & FF_THREAD_FRAME)))
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return AVERROR_EOF;
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// Flushing is signaled with a NULL frame
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frame = NULL;
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}
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got_packet = 0;
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av_assert0(avctx->codec->encode2);
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if (CONFIG_FRAME_THREAD_ENCODER &&
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avci->frame_thread_encoder && (avctx->active_thread_type & FF_THREAD_FRAME))
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/* This might modify frame, but it doesn't matter, because
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* the frame properties used below are not used for video
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* (due to the delay inherent in frame threaded encoding, it makes
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* no sense to use the properties of the current frame anyway). */
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ret = ff_thread_video_encode_frame(avctx, avpkt, frame, &got_packet);
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else {
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ret = avctx->codec->encode2(avctx, avpkt, frame, &got_packet);
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if (avctx->codec->type == AVMEDIA_TYPE_VIDEO && !ret && got_packet &&
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!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY))
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avpkt->pts = avpkt->dts = frame->pts;
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}
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av_assert0(ret <= 0);
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emms_c();
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if (!ret && got_packet) {
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if (avpkt->data) {
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ret = av_packet_make_refcounted(avpkt);
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if (ret < 0)
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goto end;
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}
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if (frame && !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY)) {
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if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
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if (avpkt->pts == AV_NOPTS_VALUE)
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avpkt->pts = frame->pts;
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if (!avpkt->duration)
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avpkt->duration = ff_samples_to_time_base(avctx,
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frame->nb_samples);
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}
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}
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if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
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avpkt->dts = avpkt->pts;
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}
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avpkt->flags |= avci->intra_only_flag;
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}
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if (avci->draining && !got_packet)
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avci->draining_done = 1;
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end:
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if (ret < 0 || !got_packet)
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av_packet_unref(avpkt);
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if (frame)
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av_frame_unref(frame);
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if (got_packet)
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// Encoders must always return ref-counted buffers.
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// Side-data only packets have no data and can be not ref-counted.
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av_assert0(!avpkt->data || avpkt->buf);
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return ret;
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}
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static int encode_simple_receive_packet(AVCodecContext *avctx, AVPacket *avpkt)
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{
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int ret;
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while (!avpkt->data && !avpkt->side_data) {
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ret = encode_simple_internal(avctx, avpkt);
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if (ret < 0)
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return ret;
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}
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return 0;
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}
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static int encode_receive_packet_internal(AVCodecContext *avctx, AVPacket *avpkt)
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{
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AVCodecInternal *avci = avctx->internal;
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int ret;
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if (avci->draining_done)
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return AVERROR_EOF;
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av_assert0(!avpkt->data && !avpkt->side_data);
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if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) {
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if ((avctx->flags & AV_CODEC_FLAG_PASS1) && avctx->stats_out)
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avctx->stats_out[0] = '\0';
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if (av_image_check_size2(avctx->width, avctx->height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx))
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return AVERROR(EINVAL);
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}
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if (avctx->codec->receive_packet) {
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ret = avctx->codec->receive_packet(avctx, avpkt);
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if (ret < 0)
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av_packet_unref(avpkt);
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else
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// Encoders must always return ref-counted buffers.
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// Side-data only packets have no data and can be not ref-counted.
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av_assert0(!avpkt->data || avpkt->buf);
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} else
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ret = encode_simple_receive_packet(avctx, avpkt);
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if (ret == AVERROR_EOF)
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avci->draining_done = 1;
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return ret;
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}
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static int encode_send_frame_internal(AVCodecContext *avctx, const AVFrame *src)
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{
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AVCodecInternal *avci = avctx->internal;
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AVFrame *dst = avci->buffer_frame;
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int ret;
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if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
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/* extract audio service type metadata */
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AVFrameSideData *sd = av_frame_get_side_data(src, AV_FRAME_DATA_AUDIO_SERVICE_TYPE);
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if (sd && sd->size >= sizeof(enum AVAudioServiceType))
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avctx->audio_service_type = *(enum AVAudioServiceType*)sd->data;
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/* check for valid frame size */
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if (avctx->codec->capabilities & AV_CODEC_CAP_SMALL_LAST_FRAME) {
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if (src->nb_samples > avctx->frame_size) {
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av_log(avctx, AV_LOG_ERROR, "more samples than frame size\n");
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return AVERROR(EINVAL);
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}
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} else if (!(avctx->codec->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE)) {
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/* if we already got an undersized frame, that must have been the last */
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if (avctx->internal->last_audio_frame) {
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av_log(avctx, AV_LOG_ERROR, "frame_size (%d) was not respected for a non-last frame\n", avctx->frame_size);
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return AVERROR(EINVAL);
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}
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if (src->nb_samples < avctx->frame_size) {
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ret = pad_last_frame(avctx, dst, src);
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if (ret < 0)
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return ret;
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avctx->internal->last_audio_frame = 1;
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} else if (src->nb_samples > avctx->frame_size) {
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av_log(avctx, AV_LOG_ERROR, "nb_samples (%d) != frame_size (%d)\n", src->nb_samples, avctx->frame_size);
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return AVERROR(EINVAL);
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}
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}
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}
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if (!dst->data[0]) {
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ret = av_frame_ref(dst, src);
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if (ret < 0)
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return ret;
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}
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return 0;
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}
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int attribute_align_arg avcodec_send_frame(AVCodecContext *avctx, const AVFrame *frame)
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{
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AVCodecInternal *avci = avctx->internal;
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int ret;
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if (!avcodec_is_open(avctx) || !av_codec_is_encoder(avctx->codec))
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return AVERROR(EINVAL);
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if (avci->draining)
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return AVERROR_EOF;
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if (avci->buffer_frame->buf[0])
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return AVERROR(EAGAIN);
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if (!frame) {
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avci->draining = 1;
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} else {
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ret = encode_send_frame_internal(avctx, frame);
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if (ret < 0)
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return ret;
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}
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if (!avci->buffer_pkt->data && !avci->buffer_pkt->side_data) {
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ret = encode_receive_packet_internal(avctx, avci->buffer_pkt);
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if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
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return ret;
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}
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avctx->frame_number++;
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return 0;
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}
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int attribute_align_arg avcodec_receive_packet(AVCodecContext *avctx, AVPacket *avpkt)
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{
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AVCodecInternal *avci = avctx->internal;
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int ret;
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av_packet_unref(avpkt);
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if (!avcodec_is_open(avctx) || !av_codec_is_encoder(avctx->codec))
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return AVERROR(EINVAL);
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if (avci->buffer_pkt->data || avci->buffer_pkt->side_data) {
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av_packet_move_ref(avpkt, avci->buffer_pkt);
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} else {
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ret = encode_receive_packet_internal(avctx, avpkt);
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if (ret < 0)
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return ret;
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}
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return 0;
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}
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int ff_encode_preinit(AVCodecContext *avctx)
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{
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int i;
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if (avctx->time_base.num <= 0 || avctx->time_base.den <= 0) {
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av_log(avctx, AV_LOG_ERROR, "The encoder timebase is not set.\n");
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return AVERROR(EINVAL);
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}
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if (avctx->codec->sample_fmts) {
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for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++) {
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if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
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break;
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if (avctx->channels == 1 &&
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av_get_planar_sample_fmt(avctx->sample_fmt) ==
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av_get_planar_sample_fmt(avctx->codec->sample_fmts[i])) {
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avctx->sample_fmt = avctx->codec->sample_fmts[i];
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break;
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}
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}
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if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
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char buf[128];
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snprintf(buf, sizeof(buf), "%d", avctx->sample_fmt);
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av_log(avctx, AV_LOG_ERROR, "Specified sample format %s is invalid or not supported\n",
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(char *)av_x_if_null(av_get_sample_fmt_name(avctx->sample_fmt), buf));
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return AVERROR(EINVAL);
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}
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}
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if (avctx->codec->pix_fmts) {
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for (i = 0; avctx->codec->pix_fmts[i] != AV_PIX_FMT_NONE; i++)
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if (avctx->pix_fmt == avctx->codec->pix_fmts[i])
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break;
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if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE) {
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char buf[128];
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snprintf(buf, sizeof(buf), "%d", avctx->pix_fmt);
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av_log(avctx, AV_LOG_ERROR, "Specified pixel format %s is invalid or not supported\n",
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(char *)av_x_if_null(av_get_pix_fmt_name(avctx->pix_fmt), buf));
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return AVERROR(EINVAL);
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}
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if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ420P ||
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avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ411P ||
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avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ422P ||
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avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ440P ||
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avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ444P)
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avctx->color_range = AVCOL_RANGE_JPEG;
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}
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if (avctx->codec->supported_samplerates) {
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for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
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if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
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break;
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if (avctx->codec->supported_samplerates[i] == 0) {
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av_log(avctx, AV_LOG_ERROR, "Specified sample rate %d is not supported\n",
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avctx->sample_rate);
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return AVERROR(EINVAL);
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}
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}
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if (avctx->sample_rate < 0) {
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av_log(avctx, AV_LOG_ERROR, "Specified sample rate %d is not supported\n",
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avctx->sample_rate);
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return AVERROR(EINVAL);
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}
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if (avctx->codec->channel_layouts) {
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if (!avctx->channel_layout) {
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av_log(avctx, AV_LOG_WARNING, "Channel layout not specified\n");
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} else {
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for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
|
|
if (avctx->channel_layout == avctx->codec->channel_layouts[i])
|
|
break;
|
|
if (avctx->codec->channel_layouts[i] == 0) {
|
|
char buf[512];
|
|
av_get_channel_layout_string(buf, sizeof(buf), -1, avctx->channel_layout);
|
|
av_log(avctx, AV_LOG_ERROR, "Specified channel layout '%s' is not supported\n", buf);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
}
|
|
}
|
|
if (avctx->channel_layout && avctx->channels) {
|
|
int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
|
|
if (channels != avctx->channels) {
|
|
char buf[512];
|
|
av_get_channel_layout_string(buf, sizeof(buf), -1, avctx->channel_layout);
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Channel layout '%s' with %d channels does not match number of specified channels %d\n",
|
|
buf, channels, avctx->channels);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
} else if (avctx->channel_layout) {
|
|
avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
|
|
}
|
|
if (avctx->channels < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "Specified number of channels %d is not supported\n",
|
|
avctx->channels);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
if(avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
|
|
const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(avctx->pix_fmt);
|
|
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->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->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;
|
|
}
|
|
if (avctx->codec_descriptor->props & AV_CODEC_PROP_INTRA_ONLY)
|
|
avctx->internal->intra_only_flag = AV_PKT_FLAG_KEY;
|
|
|
|
return 0;
|
|
}
|