459 lines
15 KiB
C
459 lines
15 KiB
C
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/*
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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/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 "frame_thread_encoder.h"
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#include "internal.h"
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int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
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{
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if (avpkt->size < 0) {
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av_log(avctx, AV_LOG_ERROR, "Invalid negative user packet size %d\n", avpkt->size);
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return AVERROR(EINVAL);
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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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if (avctx && 2*min_size < size) { // FIXME The factor needs to be finetuned
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av_assert0(!avpkt->data || avpkt->data != avctx->internal->byte_buffer);
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if (!avpkt->data || avpkt->size < size) {
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av_fast_padded_malloc(&avctx->internal->byte_buffer, &avctx->internal->byte_buffer_size, size);
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avpkt->data = avctx->internal->byte_buffer;
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avpkt->size = avctx->internal->byte_buffer_size;
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}
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}
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if (avpkt->data) {
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AVBufferRef *buf = avpkt->buf;
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if (avpkt->size < size) {
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av_log(avctx, AV_LOG_ERROR, "User packet is too small (%d < %"PRId64")\n", avpkt->size, size);
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return AVERROR(EINVAL);
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}
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av_init_packet(avpkt);
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avpkt->buf = buf;
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avpkt->size = size;
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return 0;
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} else {
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int ret = av_new_packet(avpkt, size);
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if (ret < 0)
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av_log(avctx, AV_LOG_ERROR, "Failed to allocate packet of size %"PRId64"\n", size);
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return ret;
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}
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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 **dst, const AVFrame *src)
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{
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AVFrame *frame = NULL;
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int ret;
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if (!(frame = av_frame_alloc()))
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return AVERROR(ENOMEM);
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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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*dst = frame;
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return 0;
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fail:
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av_frame_free(&frame);
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return ret;
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}
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int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx,
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AVPacket *avpkt,
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const AVFrame *frame,
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int *got_packet_ptr)
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{
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AVFrame *extended_frame = NULL;
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AVFrame *padded_frame = NULL;
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int ret;
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AVPacket user_pkt = *avpkt;
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int needs_realloc = !user_pkt.data;
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*got_packet_ptr = 0;
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if (!avctx->codec->encode2) {
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av_log(avctx, AV_LOG_ERROR, "This encoder requires using the avcodec_send_frame() API.\n");
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return AVERROR(ENOSYS);
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}
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if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY) && !frame) {
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av_packet_unref(avpkt);
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return 0;
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}
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/* ensure that extended_data is properly set */
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if (frame && !frame->extended_data) {
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if (av_sample_fmt_is_planar(avctx->sample_fmt) &&
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avctx->channels > AV_NUM_DATA_POINTERS) {
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av_log(avctx, AV_LOG_ERROR, "Encoding to a planar sample format, "
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"with more than %d channels, but extended_data is not set.\n",
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AV_NUM_DATA_POINTERS);
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return AVERROR(EINVAL);
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}
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av_log(avctx, AV_LOG_WARNING, "extended_data is not set.\n");
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extended_frame = av_frame_alloc();
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if (!extended_frame)
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return AVERROR(ENOMEM);
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memcpy(extended_frame, frame, sizeof(AVFrame));
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extended_frame->extended_data = extended_frame->data;
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frame = extended_frame;
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}
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/* extract audio service type metadata */
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if (frame) {
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AVFrameSideData *sd = av_frame_get_side_data(frame, 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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}
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/* check for valid frame size */
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if (frame) {
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if (avctx->codec->capabilities & AV_CODEC_CAP_SMALL_LAST_FRAME) {
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if (frame->nb_samples > avctx->frame_size) {
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av_log(avctx, AV_LOG_ERROR, "more samples than frame size (avcodec_encode_audio2)\n");
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ret = AVERROR(EINVAL);
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goto end;
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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 (avcodec_encode_audio2)\n", avctx->frame_size);
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ret = AVERROR(EINVAL);
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goto end;
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}
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if (frame->nb_samples < avctx->frame_size) {
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ret = pad_last_frame(avctx, &padded_frame, frame);
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if (ret < 0)
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goto end;
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frame = padded_frame;
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avctx->internal->last_audio_frame = 1;
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}
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if (frame->nb_samples != avctx->frame_size) {
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av_log(avctx, AV_LOG_ERROR, "nb_samples (%d) != frame_size (%d) (avcodec_encode_audio2)\n", frame->nb_samples, avctx->frame_size);
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ret = AVERROR(EINVAL);
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goto end;
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}
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}
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}
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av_assert0(avctx->codec->encode2);
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ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
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if (!ret) {
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if (*got_packet_ptr) {
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if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY)) {
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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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avpkt->dts = avpkt->pts;
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} else {
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avpkt->size = 0;
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}
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}
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if (avpkt->data && avpkt->data == avctx->internal->byte_buffer) {
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needs_realloc = 0;
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if (user_pkt.data) {
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if (user_pkt.size >= avpkt->size) {
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memcpy(user_pkt.data, avpkt->data, avpkt->size);
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} else {
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av_log(avctx, AV_LOG_ERROR, "Provided packet is too small, needs to be %d\n", avpkt->size);
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avpkt->size = user_pkt.size;
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ret = -1;
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}
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avpkt->buf = user_pkt.buf;
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avpkt->data = user_pkt.data;
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} else if (!avpkt->buf) {
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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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}
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if (!ret) {
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if (needs_realloc && avpkt->data) {
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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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avpkt->data = avpkt->buf->data;
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}
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if (frame)
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avctx->frame_number++;
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}
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if (ret < 0 || !*got_packet_ptr) {
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av_packet_unref(avpkt);
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goto end;
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}
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/* NOTE: if we add any audio encoders which output non-keyframe packets,
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* this needs to be moved to the encoders, but for now we can do it
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* here to simplify things */
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avpkt->flags |= AV_PKT_FLAG_KEY;
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end:
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av_frame_free(&padded_frame);
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av_free(extended_frame);
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return ret;
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}
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int attribute_align_arg avcodec_encode_video2(AVCodecContext *avctx,
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AVPacket *avpkt,
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const AVFrame *frame,
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int *got_packet_ptr)
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{
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int ret;
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AVPacket user_pkt = *avpkt;
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int needs_realloc = !user_pkt.data;
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*got_packet_ptr = 0;
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if (!avctx->codec->encode2) {
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av_log(avctx, AV_LOG_ERROR, "This encoder requires using the avcodec_send_frame() API.\n");
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return AVERROR(ENOSYS);
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}
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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 (!frame &&
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!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY ||
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(avctx->internal->frame_thread_encoder && avctx->active_thread_type & FF_THREAD_FRAME))) {
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av_packet_unref(avpkt);
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return 0;
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}
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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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if (frame && frame->format == AV_PIX_FMT_NONE)
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av_log(avctx, AV_LOG_WARNING, "AVFrame.format is not set\n");
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if (frame && (frame->width == 0 || frame->height == 0))
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av_log(avctx, AV_LOG_WARNING, "AVFrame.width or height is not set\n");
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av_assert0(avctx->codec->encode2);
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if (CONFIG_FRAME_THREAD_ENCODER &&
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avctx->internal->frame_thread_encoder && (avctx->active_thread_type & FF_THREAD_FRAME))
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ret = ff_thread_video_encode_frame(avctx, avpkt, frame, got_packet_ptr);
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else {
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ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
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if (*got_packet_ptr && !(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 (avpkt->data && avpkt->data == avctx->internal->byte_buffer) {
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needs_realloc = 0;
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if (user_pkt.data) {
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if (user_pkt.size >= avpkt->size) {
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memcpy(user_pkt.data, avpkt->data, avpkt->size);
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} else {
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av_log(avctx, AV_LOG_ERROR, "Provided packet is too small, needs to be %d\n", avpkt->size);
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avpkt->size = user_pkt.size;
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ret = -1;
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}
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avpkt->buf = user_pkt.buf;
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avpkt->data = user_pkt.data;
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} else if (!avpkt->buf) {
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ret = av_packet_make_refcounted(avpkt);
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if (ret < 0)
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return ret;
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}
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}
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if (!ret) {
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if (!*got_packet_ptr)
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avpkt->size = 0;
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if (needs_realloc && avpkt->data) {
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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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avpkt->data = avpkt->buf->data;
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}
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if (frame)
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avctx->frame_number++;
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}
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if (ret < 0 || !*got_packet_ptr)
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av_packet_unref(avpkt);
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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;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = avctx->codec->encode_sub(avctx, buf, buf_size, sub);
|
||
|
|
avctx->frame_number++;
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int do_encode(AVCodecContext *avctx, const AVFrame *frame, int *got_packet)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
*got_packet = 0;
|
||
|
|
|
||
|
|
av_packet_unref(avctx->internal->buffer_pkt);
|
||
|
|
avctx->internal->buffer_pkt_valid = 0;
|
||
|
|
|
||
|
|
if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
|
||
|
|
ret = avcodec_encode_video2(avctx, avctx->internal->buffer_pkt,
|
||
|
|
frame, got_packet);
|
||
|
|
} else if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
|
||
|
|
ret = avcodec_encode_audio2(avctx, avctx->internal->buffer_pkt,
|
||
|
|
frame, got_packet);
|
||
|
|
} else {
|
||
|
|
ret = AVERROR(EINVAL);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ret >= 0 && *got_packet) {
|
||
|
|
// Encoders must always return ref-counted buffers.
|
||
|
|
// Side-data only packets have no data and can be not ref-counted.
|
||
|
|
av_assert0(!avctx->internal->buffer_pkt->data || avctx->internal->buffer_pkt->buf);
|
||
|
|
avctx->internal->buffer_pkt_valid = 1;
|
||
|
|
ret = 0;
|
||
|
|
} else {
|
||
|
|
av_packet_unref(avctx->internal->buffer_pkt);
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
int attribute_align_arg avcodec_send_frame(AVCodecContext *avctx, const AVFrame *frame)
|
||
|
|
{
|
||
|
|
if (!avcodec_is_open(avctx) || !av_codec_is_encoder(avctx->codec))
|
||
|
|
return AVERROR(EINVAL);
|
||
|
|
|
||
|
|
if (avctx->internal->draining)
|
||
|
|
return AVERROR_EOF;
|
||
|
|
|
||
|
|
if (!frame) {
|
||
|
|
avctx->internal->draining = 1;
|
||
|
|
|
||
|
|
if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY))
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (avctx->codec->send_frame)
|
||
|
|
return avctx->codec->send_frame(avctx, frame);
|
||
|
|
|
||
|
|
// Emulation via old API. Do it here instead of avcodec_receive_packet, because:
|
||
|
|
// 1. if the AVFrame is not refcounted, the copying will be much more
|
||
|
|
// expensive than copying the packet data
|
||
|
|
// 2. assume few users use non-refcounted AVPackets, so usually no copy is
|
||
|
|
// needed
|
||
|
|
|
||
|
|
if (avctx->internal->buffer_pkt_valid)
|
||
|
|
return AVERROR(EAGAIN);
|
||
|
|
|
||
|
|
return do_encode(avctx, frame, &(int){0});
|
||
|
|
}
|
||
|
|
|
||
|
|
int attribute_align_arg avcodec_receive_packet(AVCodecContext *avctx, AVPacket *avpkt)
|
||
|
|
{
|
||
|
|
av_packet_unref(avpkt);
|
||
|
|
|
||
|
|
if (!avcodec_is_open(avctx) || !av_codec_is_encoder(avctx->codec))
|
||
|
|
return AVERROR(EINVAL);
|
||
|
|
|
||
|
|
if (avctx->codec->receive_packet) {
|
||
|
|
int ret;
|
||
|
|
if (avctx->internal->draining && !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY))
|
||
|
|
return AVERROR_EOF;
|
||
|
|
ret = avctx->codec->receive_packet(avctx, avpkt);
|
||
|
|
if (!ret)
|
||
|
|
// 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);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Emulation via old API.
|
||
|
|
|
||
|
|
if (!avctx->internal->buffer_pkt_valid) {
|
||
|
|
int got_packet;
|
||
|
|
int ret;
|
||
|
|
if (!avctx->internal->draining)
|
||
|
|
return AVERROR(EAGAIN);
|
||
|
|
ret = do_encode(avctx, NULL, &got_packet);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
if (ret >= 0 && !got_packet)
|
||
|
|
return AVERROR_EOF;
|
||
|
|
}
|
||
|
|
|
||
|
|
av_packet_move_ref(avpkt, avctx->internal->buffer_pkt);
|
||
|
|
avctx->internal->buffer_pkt_valid = 0;
|
||
|
|
return 0;
|
||
|
|
}
|