summaryrefslogtreecommitdiff
path: root/contrib/ffmpeg/libavformat/wav.c
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/ffmpeg/libavformat/wav.c')
-rw-r--r--contrib/ffmpeg/libavformat/wav.c285
1 files changed, 0 insertions, 285 deletions
diff --git a/contrib/ffmpeg/libavformat/wav.c b/contrib/ffmpeg/libavformat/wav.c
deleted file mode 100644
index 0699bec70..000000000
--- a/contrib/ffmpeg/libavformat/wav.c
+++ /dev/null
@@ -1,285 +0,0 @@
-/*
- * WAV muxer and demuxer
- * Copyright (c) 2001, 2002 Fabrice Bellard.
- *
- * 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 "avformat.h"
-#include "allformats.h"
-#include "riff.h"
-
-typedef struct {
- offset_t data;
- offset_t data_end;
- int64_t minpts;
- int64_t maxpts;
- int last_duration;
-} WAVContext;
-
-#ifdef CONFIG_MUXERS
-static int wav_write_header(AVFormatContext *s)
-{
- WAVContext *wav = s->priv_data;
- ByteIOContext *pb = &s->pb;
- offset_t fmt, fact;
-
- put_tag(pb, "RIFF");
- put_le32(pb, 0); /* file length */
- put_tag(pb, "WAVE");
-
- /* format header */
- fmt = start_tag(pb, "fmt ");
- if (put_wav_header(pb, s->streams[0]->codec) < 0) {
- av_free(wav);
- return -1;
- }
- end_tag(pb, fmt);
-
- if(s->streams[0]->codec->codec_tag != 0x01 /* hence for all other than PCM */
- && !url_is_streamed(&s->pb)) {
- fact = start_tag(pb, "fact");
- put_le32(pb, 0);
- end_tag(pb, fact);
- }
-
- av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
- wav->maxpts = wav->last_duration = 0;
- wav->minpts = INT64_MAX;
-
- /* data header */
- wav->data = start_tag(pb, "data");
-
- put_flush_packet(pb);
-
- return 0;
-}
-
-static int wav_write_packet(AVFormatContext *s, AVPacket *pkt)
-{
- ByteIOContext *pb = &s->pb;
- WAVContext *wav = s->priv_data;
- put_buffer(pb, pkt->data, pkt->size);
- if(pkt->pts != AV_NOPTS_VALUE) {
- wav->minpts = FFMIN(wav->minpts, pkt->pts);
- wav->maxpts = FFMAX(wav->maxpts, pkt->pts);
- wav->last_duration = pkt->duration;
- } else
- av_log(s, AV_LOG_ERROR, "wav_write_packet: NOPTS\n");
- return 0;
-}
-
-static int wav_write_trailer(AVFormatContext *s)
-{
- ByteIOContext *pb = &s->pb;
- WAVContext *wav = s->priv_data;
- offset_t file_size;
-
- if (!url_is_streamed(&s->pb)) {
- end_tag(pb, wav->data);
-
- /* update file size */
- file_size = url_ftell(pb);
- url_fseek(pb, 4, SEEK_SET);
- put_le32(pb, (uint32_t)(file_size - 8));
- url_fseek(pb, file_size, SEEK_SET);
-
- put_flush_packet(pb);
-
- if(s->streams[0]->codec->codec_tag != 0x01) {
- /* Update num_samps in fact chunk */
- int number_of_samples;
- number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration,
- s->streams[0]->codec->sample_rate * (int64_t)s->streams[0]->time_base.num,
- s->streams[0]->time_base.den);
- url_fseek(pb, wav->data-12, SEEK_SET);
- put_le32(pb, number_of_samples);
- url_fseek(pb, file_size, SEEK_SET);
- put_flush_packet(pb);
- }
- }
- return 0;
-}
-#endif //CONFIG_MUXERS
-
-/* return the size of the found tag */
-/* XXX: > 2GB ? */
-static int find_tag(ByteIOContext *pb, uint32_t tag1)
-{
- unsigned int tag;
- int size;
-
- for(;;) {
- if (url_feof(pb))
- return -1;
- tag = get_le32(pb);
- size = get_le32(pb);
- if (tag == tag1)
- break;
- url_fseek(pb, size, SEEK_CUR);
- }
- if (size < 0)
- size = 0x7fffffff;
- return size;
-}
-
-static int wav_probe(AVProbeData *p)
-{
- /* check file header */
- if (p->buf_size <= 32)
- return 0;
- if (p->buf[0] == 'R' && p->buf[1] == 'I' &&
- p->buf[2] == 'F' && p->buf[3] == 'F' &&
- p->buf[8] == 'W' && p->buf[9] == 'A' &&
- p->buf[10] == 'V' && p->buf[11] == 'E')
- return AVPROBE_SCORE_MAX;
- else
- return 0;
-}
-
-/* wav input */
-static int wav_read_header(AVFormatContext *s,
- AVFormatParameters *ap)
-{
- int size;
- unsigned int tag;
- ByteIOContext *pb = &s->pb;
- AVStream *st;
- WAVContext *wav = s->priv_data;
-
- /* check RIFF header */
- tag = get_le32(pb);
-
- if (tag != MKTAG('R', 'I', 'F', 'F'))
- return -1;
- get_le32(pb); /* file size */
- tag = get_le32(pb);
- if (tag != MKTAG('W', 'A', 'V', 'E'))
- return -1;
-
- /* parse fmt header */
- size = find_tag(pb, MKTAG('f', 'm', 't', ' '));
- if (size < 0)
- return -1;
- st = av_new_stream(s, 0);
- if (!st)
- return AVERROR_NOMEM;
-
- get_wav_header(pb, st->codec, size);
- st->need_parsing = 1;
-
- av_set_pts_info(st, 64, 1, st->codec->sample_rate);
-
- size = find_tag(pb, MKTAG('d', 'a', 't', 'a'));
- if (size < 0)
- return -1;
- wav->data_end= url_ftell(pb) + size;
- return 0;
-}
-
-#define MAX_SIZE 4096
-
-static int wav_read_packet(AVFormatContext *s,
- AVPacket *pkt)
-{
- int ret, size, left;
- AVStream *st;
- WAVContext *wav = s->priv_data;
-
- if (url_feof(&s->pb))
- return AVERROR_IO;
- st = s->streams[0];
-
- left= wav->data_end - url_ftell(&s->pb);
- if(left <= 0){
- left = find_tag(&(s->pb), MKTAG('d', 'a', 't', 'a'));
- if (left < 0) {
- return AVERROR_IO;
- }
- wav->data_end= url_ftell(&s->pb) + left;
- }
-
- size = MAX_SIZE;
- if (st->codec->block_align > 1) {
- if (size < st->codec->block_align)
- size = st->codec->block_align;
- size = (size / st->codec->block_align) * st->codec->block_align;
- }
- size= FFMIN(size, left);
- ret= av_get_packet(&s->pb, pkt, size);
- if (ret <= 0)
- return AVERROR_IO;
- pkt->stream_index = 0;
-
- /* note: we need to modify the packet size here to handle the last
- packet */
- pkt->size = ret;
- return ret;
-}
-
-static int wav_read_close(AVFormatContext *s)
-{
- return 0;
-}
-
-static int wav_read_seek(AVFormatContext *s,
- int stream_index, int64_t timestamp, int flags)
-{
- AVStream *st;
-
- st = s->streams[0];
- switch(st->codec->codec_id) {
- case CODEC_ID_MP2:
- case CODEC_ID_MP3:
- case CODEC_ID_AC3:
- case CODEC_ID_DTS:
- /* use generic seeking with dynamically generated indexes */
- return -1;
- default:
- break;
- }
- return pcm_read_seek(s, stream_index, timestamp, flags);
-}
-
-#ifdef CONFIG_WAV_DEMUXER
-AVInputFormat wav_demuxer = {
- "wav",
- "wav format",
- sizeof(WAVContext),
- wav_probe,
- wav_read_header,
- wav_read_packet,
- wav_read_close,
- wav_read_seek,
- .flags= AVFMT_GENERIC_INDEX,
- .codec_tag= (const AVCodecTag*[]){codec_wav_tags, 0},
-};
-#endif
-#ifdef CONFIG_WAV_MUXER
-AVOutputFormat wav_muxer = {
- "wav",
- "wav format",
- "audio/x-wav",
- "wav",
- sizeof(WAVContext),
- CODEC_ID_PCM_S16LE,
- CODEC_ID_NONE,
- wav_write_header,
- wav_write_packet,
- wav_write_trailer,
- .codec_tag= (const AVCodecTag*[]){codec_wav_tags, 0},
-};
-#endif
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-25 09:02:51 +0000