mirror of https://github.com/FFmpeg/FFmpeg.git
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Signed-off-by: James Almer <jamrial@gmail.com>pull/228/head
James Almer
9 years ago
parent
ce944e8489
commit
376d4b3c0d
12 changed files with 174 additions and 7 deletions
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/*
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* True Audio (TTA) muxer |
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* Copyright (c) 2016 James Almer |
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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/crc.h" |
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#include "libavutil/intreadwrite.h" |
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#include "apetag.h" |
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#include "avformat.h" |
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#include "avio_internal.h" |
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#include "internal.h" |
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typedef struct TTAMuxContext { |
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AVIOContext *seek_table; |
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AVIOContext *data; |
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uint32_t nb_samples; |
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int frame_size; |
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int last_frame; |
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} TTAMuxContext; |
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static int tta_write_header(AVFormatContext *s) |
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{ |
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TTAMuxContext *tta = s->priv_data; |
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AVCodecParameters *par = s->streams[0]->codecpar; |
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int ret; |
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if (s->nb_streams != 1) { |
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av_log(s, AV_LOG_ERROR, "Only one stream is supported\n"); |
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return AVERROR(EINVAL); |
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} |
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if (par->codec_id != AV_CODEC_ID_TTA) { |
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av_log(s, AV_LOG_ERROR, "Unsupported codec\n"); |
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return AVERROR(EINVAL); |
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} |
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if (par->extradata && par->extradata_size < 22) { |
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av_log(s, AV_LOG_ERROR, "Invalid TTA extradata\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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if ((ret = avio_open_dyn_buf(&tta->seek_table)) < 0) |
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return ret; |
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if ((ret = avio_open_dyn_buf(&tta->data)) < 0) { |
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ffio_free_dyn_buf(&tta->seek_table); |
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return ret; |
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} |
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/* Ignore most extradata information if present. It can be innacurate
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if for example remuxing from Matroska */ |
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ffio_init_checksum(s->pb, ff_crcEDB88320_update, UINT32_MAX); |
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ffio_init_checksum(tta->seek_table, ff_crcEDB88320_update, UINT32_MAX); |
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avio_write(s->pb, "TTA1", 4); |
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avio_wl16(s->pb, par->extradata ? AV_RL16(par->extradata + 4) : 1); |
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avio_wl16(s->pb, par->channels); |
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avio_wl16(s->pb, par->bits_per_raw_sample); |
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avio_wl32(s->pb, par->sample_rate); |
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/* Prevent overflow */ |
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if (par->sample_rate > 0x7FFFFFu) { |
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av_log(s, AV_LOG_ERROR, "Sample rate too large\n"); |
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return AVERROR(EINVAL); |
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} |
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tta->frame_size = par->sample_rate * 256 / 245; |
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avpriv_set_pts_info(s->streams[0], 64, 1, par->sample_rate); |
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return 0; |
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} |
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static int tta_write_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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TTAMuxContext *tta = s->priv_data; |
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avio_write(tta->data, pkt->data, pkt->size); |
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avio_wl32(tta->seek_table, pkt->size); |
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tta->nb_samples += pkt->duration; |
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if (tta->frame_size != pkt->duration) { |
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if (tta->last_frame) { |
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/* Two frames with a different duration than the default frame
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size means the TTA stream comes from a faulty container, and |
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there's no way the last frame duration will be correct. */ |
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av_log(s, AV_LOG_ERROR, "Invalid frame durations\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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/* First frame with a different duration than the default frame size.
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Assume it's the last frame in the stream and continue. */ |
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tta->last_frame++; |
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} |
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return 0; |
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} |
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static int tta_write_trailer(AVFormatContext *s) |
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{ |
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TTAMuxContext *tta = s->priv_data; |
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uint8_t *ptr; |
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unsigned int crc; |
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int size; |
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avio_wl32(s->pb, tta->nb_samples); |
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crc = ffio_get_checksum(s->pb) ^ UINT32_MAX; |
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avio_wl32(s->pb, crc); |
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/* Write Seek table */ |
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crc = ffio_get_checksum(tta->seek_table) ^ UINT32_MAX; |
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avio_wl32(tta->seek_table, crc); |
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size = avio_close_dyn_buf(tta->seek_table, &ptr); |
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avio_write(s->pb, ptr, size); |
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av_free(ptr); |
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/* Write audio data */ |
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size = avio_close_dyn_buf(tta->data, &ptr); |
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avio_write(s->pb, ptr, size); |
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av_free(ptr); |
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ff_ape_write_tag(s); |
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avio_flush(s->pb); |
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return 0; |
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} |
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AVOutputFormat ff_tta_muxer = { |
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.name = "tta", |
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.long_name = NULL_IF_CONFIG_SMALL("TTA (True Audio)"), |
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.mime_type = "audio/x-tta", |
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.extensions = "tta", |
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.priv_data_size = sizeof(TTAMuxContext), |
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.audio_codec = AV_CODEC_ID_TTA, |
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.video_codec = AV_CODEC_ID_NONE, |
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.write_header = tta_write_header, |
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.write_packet = tta_write_packet, |
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.write_trailer = tta_write_trailer, |
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}; |
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@ -1,4 +1,4 @@ |
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6c260836d7a32e4bd714453a3546c0d5 *tests/data/fate/acodec-tta.matroska |
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331148 tests/data/fate/acodec-tta.matroska |
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847d065f082ac94825728b5f1af853eb *tests/data/fate/acodec-tta.tta |
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330583 tests/data/fate/acodec-tta.tta |
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95e54b261530a1bcf6de6fe3b21dc5f6 *tests/data/fate/acodec-tta.out.wav |
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stddev: 0.00 PSNR:999.99 MAXDIFF: 0 bytes: 1058400/ 1058400 |
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@ -0,0 +1,3 @@ |
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b2e3746787b885d0191a1a26f3faa58f *./tests/data/lavf/lavf.mka |
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43654 ./tests/data/lavf/lavf.mka |
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./tests/data/lavf/lavf.mka CRC=0x3a1da17e |
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@ -0,0 +1,3 @@ |
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f2721d06704ac43d89fdd25835b43598 *./tests/data/lavf/lavf.tta |
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43200 ./tests/data/lavf/lavf.tta |
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./tests/data/lavf/lavf.tta CRC=0x3a1da17e |
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