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![Michael Niedermayer](/assets/img/avatar_default.png)
* qatar/master: lavc: add a libwavpack encoder wrapper Conflicts: Changelog doc/encoders.texi libavcodec/version.h Merged-by: Michael Niedermayer <michaelni@gmx.at>
195 lines
5.5 KiB
C
195 lines
5.5 KiB
C
/*
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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 <wavpack/wavpack.h>
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#include <string.h>
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#include "libavutil/attributes.h"
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#include "libavutil/opt.h"
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#include "libavutil/samplefmt.h"
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#include "audio_frame_queue.h"
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#include "avcodec.h"
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#include "internal.h"
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#define WV_DEFAULT_BLOCK_SIZE 32768
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typedef struct LibWavpackContext {
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const AVClass *class;
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WavpackContext *wv;
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AudioFrameQueue afq;
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AVPacket *pkt;
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int user_size;
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int got_output;
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} LibWavpackContext;
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static int wavpack_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *frame, int *got_output)
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{
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LibWavpackContext *s = avctx->priv_data;
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int ret;
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s->got_output = 0;
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s->pkt = pkt;
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s->user_size = pkt->size;
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if (frame) {
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ret = ff_af_queue_add(&s->afq, frame);
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if (ret < 0)
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return ret;
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ret = WavpackPackSamples(s->wv, (int32_t*)frame->data[0], frame->nb_samples);
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if (!ret) {
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av_log(avctx, AV_LOG_ERROR, "Error encoding a frame: %s\n",
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WavpackGetErrorMessage(s->wv));
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return AVERROR_UNKNOWN;
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}
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}
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if (!s->got_output &&
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(!frame || frame->nb_samples < avctx->frame_size)) {
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ret = WavpackFlushSamples(s->wv);
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if (!ret) {
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av_log(avctx, AV_LOG_ERROR, "Error flushing the encoder: %s\n",
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WavpackGetErrorMessage(s->wv));
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return AVERROR_UNKNOWN;
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}
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}
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if (s->got_output) {
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ff_af_queue_remove(&s->afq, avctx->frame_size, &pkt->pts, &pkt->duration);
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*got_output = 1;
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}
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return 0;
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}
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static int encode_callback(void *id, void *data, int32_t count)
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{
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AVCodecContext *avctx = id;
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LibWavpackContext *s = avctx->priv_data;
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int ret, offset = s->pkt->size;
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if (s->user_size) {
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if (s->user_size - count < s->pkt->size) {
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av_log(avctx, AV_LOG_ERROR, "Provided packet too small.\n");
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return 0;
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}
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s->pkt->size += count;
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} else {
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ret = av_grow_packet(s->pkt, count);
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if (ret < 0) {
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av_log(avctx, AV_LOG_ERROR, "Error allocating output packet.\n");
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return 0;
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}
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}
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memcpy(s->pkt->data + offset, data, count);
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s->got_output = 1;
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return 1;
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}
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static av_cold int wavpack_encode_init(AVCodecContext *avctx)
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{
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LibWavpackContext *s = avctx->priv_data;
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WavpackConfig config = { 0 };
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int ret;
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s->wv = WavpackOpenFileOutput(encode_callback, avctx, NULL);
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if (!s->wv) {
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av_log(avctx, AV_LOG_ERROR, "Error allocating the encoder.\n");
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return AVERROR(ENOMEM);
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}
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if (!avctx->frame_size)
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avctx->frame_size = WV_DEFAULT_BLOCK_SIZE;
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config.bytes_per_sample = 4;
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config.bits_per_sample = 32;
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config.block_samples = avctx->frame_size;
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config.channel_mask = avctx->channel_layout;
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config.num_channels = avctx->channels;
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config.sample_rate = avctx->sample_rate;
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if (avctx->compression_level != FF_COMPRESSION_DEFAULT) {
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if (avctx->compression_level >= 3) {
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config.flags |= CONFIG_VERY_HIGH_FLAG;
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if (avctx->compression_level >= 8)
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config.xmode = 6;
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else if (avctx->compression_level >= 7)
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config.xmode = 5;
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else if (avctx->compression_level >= 6)
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config.xmode = 4;
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else if (avctx->compression_level >= 5)
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config.xmode = 3;
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else if (avctx->compression_level >= 4)
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config.xmode = 2;
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} else if (avctx->compression_level >= 2)
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config.flags |= CONFIG_HIGH_FLAG;
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else if (avctx->compression_level < 1)
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config.flags |= CONFIG_FAST_FLAG;
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}
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ret = WavpackSetConfiguration(s->wv, &config, -1);
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if (!ret)
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goto fail;
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ret = WavpackPackInit(s->wv);
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if (!ret)
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goto fail;
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ff_af_queue_init(avctx, &s->afq);
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return 0;
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fail:
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av_log(avctx, AV_LOG_ERROR, "Error configuring the encoder: %s.\n",
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WavpackGetErrorMessage(s->wv));
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WavpackCloseFile(s->wv);
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return AVERROR_UNKNOWN;
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}
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static av_cold int wavpack_encode_close(AVCodecContext *avctx)
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{
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LibWavpackContext *s = avctx->priv_data;
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WavpackCloseFile(s->wv);
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ff_af_queue_close(&s->afq);
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return 0;
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}
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AVCodec ff_libwavpack_encoder = {
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.name = "libwavpack",
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.type = AVMEDIA_TYPE_AUDIO,
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.id = AV_CODEC_ID_WAVPACK,
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.priv_data_size = sizeof(LibWavpackContext),
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.init = wavpack_encode_init,
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.encode2 = wavpack_encode_frame,
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.close = wavpack_encode_close,
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.capabilities = CODEC_CAP_DELAY | CODEC_CAP_SMALL_LAST_FRAME,
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.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S32,
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AV_SAMPLE_FMT_NONE },
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};
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