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