mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-30 21:26:13 +02:00
186 lines
5.3 KiB
C
186 lines
5.3 KiB
C
/*
|
|
* True Audio (TTA) muxer
|
|
* Copyright (c) 2016 James Almer
|
|
*
|
|
* 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/crc.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
|
|
#include "apetag.h"
|
|
#include "avformat.h"
|
|
#include "avio_internal.h"
|
|
#include "internal.h"
|
|
|
|
typedef struct TTAMuxContext {
|
|
AVIOContext *seek_table;
|
|
AVPacketList *queue, *queue_end;
|
|
uint32_t nb_samples;
|
|
int frame_size;
|
|
int last_frame;
|
|
} TTAMuxContext;
|
|
|
|
static int tta_init(AVFormatContext *s)
|
|
{
|
|
TTAMuxContext *tta = s->priv_data;
|
|
AVCodecParameters *par;
|
|
|
|
if (s->nb_streams != 1) {
|
|
av_log(s, AV_LOG_ERROR, "Only one stream is supported\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
par = s->streams[0]->codecpar;
|
|
|
|
if (par->codec_id != AV_CODEC_ID_TTA) {
|
|
av_log(s, AV_LOG_ERROR, "Unsupported codec\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
if (par->extradata && par->extradata_size < 22) {
|
|
av_log(s, AV_LOG_ERROR, "Invalid TTA extradata\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
/* Prevent overflow */
|
|
if (par->sample_rate > 0x7FFFFFu) {
|
|
av_log(s, AV_LOG_ERROR, "Sample rate too large\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
tta->frame_size = par->sample_rate * 256 / 245;
|
|
avpriv_set_pts_info(s->streams[0], 64, 1, par->sample_rate);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tta_write_header(AVFormatContext *s)
|
|
{
|
|
TTAMuxContext *tta = s->priv_data;
|
|
AVCodecParameters *par = s->streams[0]->codecpar;
|
|
int ret;
|
|
|
|
if ((ret = avio_open_dyn_buf(&tta->seek_table)) < 0)
|
|
return ret;
|
|
|
|
/* Ignore most extradata information if present. It can be innacurate
|
|
if for example remuxing from Matroska */
|
|
ffio_init_checksum(s->pb, ff_crcEDB88320_update, UINT32_MAX);
|
|
ffio_init_checksum(tta->seek_table, ff_crcEDB88320_update, UINT32_MAX);
|
|
avio_write(s->pb, "TTA1", 4);
|
|
avio_wl16(s->pb, par->extradata ? AV_RL16(par->extradata + 4) : 1);
|
|
avio_wl16(s->pb, par->channels);
|
|
avio_wl16(s->pb, par->bits_per_raw_sample);
|
|
avio_wl32(s->pb, par->sample_rate);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tta_write_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
TTAMuxContext *tta = s->priv_data;
|
|
AVPacketList *pktl = av_mallocz(sizeof(*pktl));
|
|
int ret;
|
|
|
|
if (!pktl)
|
|
return AVERROR(ENOMEM);
|
|
|
|
ret = av_packet_ref(&pktl->pkt, pkt);
|
|
if (ret < 0) {
|
|
av_free(pktl);
|
|
return ret;
|
|
}
|
|
if (tta->queue_end)
|
|
tta->queue_end->next = pktl;
|
|
else
|
|
tta->queue = pktl;
|
|
tta->queue_end = pktl;
|
|
|
|
avio_wl32(tta->seek_table, pkt->size);
|
|
tta->nb_samples += pkt->duration;
|
|
|
|
if (tta->frame_size != pkt->duration) {
|
|
if (tta->last_frame) {
|
|
/* Two frames with a different duration than the default frame
|
|
size means the TTA stream comes from a faulty container, and
|
|
there's no way the last frame duration will be correct. */
|
|
av_log(s, AV_LOG_ERROR, "Invalid frame durations\n");
|
|
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
/* First frame with a different duration than the default frame size.
|
|
Assume it's the last frame in the stream and continue. */
|
|
tta->last_frame++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tta_queue_flush(AVFormatContext *s)
|
|
{
|
|
TTAMuxContext *tta = s->priv_data;
|
|
AVPacketList *pktl;
|
|
|
|
while (pktl = tta->queue) {
|
|
AVPacket *pkt = &pktl->pkt;
|
|
avio_write(s->pb, pkt->data, pkt->size);
|
|
av_packet_unref(pkt);
|
|
tta->queue = pktl->next;
|
|
av_free(pktl);
|
|
}
|
|
tta->queue_end = NULL;
|
|
}
|
|
|
|
static int tta_write_trailer(AVFormatContext *s)
|
|
{
|
|
TTAMuxContext *tta = s->priv_data;
|
|
uint8_t *ptr;
|
|
unsigned int crc;
|
|
int size;
|
|
|
|
avio_wl32(s->pb, tta->nb_samples);
|
|
crc = ffio_get_checksum(s->pb) ^ UINT32_MAX;
|
|
avio_wl32(s->pb, crc);
|
|
|
|
/* Write Seek table */
|
|
crc = ffio_get_checksum(tta->seek_table) ^ UINT32_MAX;
|
|
avio_wl32(tta->seek_table, crc);
|
|
size = avio_close_dyn_buf(tta->seek_table, &ptr);
|
|
avio_write(s->pb, ptr, size);
|
|
av_free(ptr);
|
|
|
|
/* Write audio data */
|
|
tta_queue_flush(s);
|
|
|
|
ff_ape_write_tag(s);
|
|
avio_flush(s->pb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVOutputFormat ff_tta_muxer = {
|
|
.name = "tta",
|
|
.long_name = NULL_IF_CONFIG_SMALL("TTA (True Audio)"),
|
|
.mime_type = "audio/x-tta",
|
|
.extensions = "tta",
|
|
.priv_data_size = sizeof(TTAMuxContext),
|
|
.audio_codec = AV_CODEC_ID_TTA,
|
|
.video_codec = AV_CODEC_ID_NONE,
|
|
.init = tta_init,
|
|
.write_header = tta_write_header,
|
|
.write_packet = tta_write_packet,
|
|
.write_trailer = tta_write_trailer,
|
|
};
|