mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-12-05 03:08:25 -05:00
181 lines
5.2 KiB
C
Executable File
181 lines
5.2 KiB
C
Executable File
/*
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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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AVPacketList *queue, *queue_end;
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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_init(AVFormatContext *s)
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{
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TTAMuxContext *tta = s->priv_data;
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AVCodecParameters *par;
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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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par = s->streams[0]->codecpar;
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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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/* 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_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 ((ret = avio_open_dyn_buf(&tta->seek_table)) < 0)
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return ret;
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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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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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int ret;
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ret = ff_packet_list_put(&tta->queue, &tta->queue_end, pkt,
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FF_PACKETLIST_FLAG_REF_PACKET);
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if (ret < 0) {
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return ret;
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}
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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 void tta_queue_flush(AVFormatContext *s)
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{
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TTAMuxContext *tta = s->priv_data;
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AVPacket pkt;
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while (tta->queue) {
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ff_packet_list_get(&tta->queue, &tta->queue_end, &pkt);
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avio_write(s->pb, pkt.data, pkt.size);
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av_packet_unref(&pkt);
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}
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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_get_dyn_buf(tta->seek_table, &ptr);
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avio_write(s->pb, ptr, size);
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/* Write audio data */
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tta_queue_flush(s);
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ff_ape_write_tag(s);
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return 0;
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}
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static void tta_deinit(AVFormatContext *s)
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{
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TTAMuxContext *tta = s->priv_data;
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ffio_free_dyn_buf(&tta->seek_table);
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ff_packet_list_free(&tta->queue, &tta->queue_end);
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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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.init = tta_init,
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.deinit = tta_deinit,
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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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