summaryrefslogtreecommitdiff
path: root/ffmpeg/libavformat/mmf.c
diff options
context:
space:
mode:
Diffstat (limited to 'ffmpeg/libavformat/mmf.c')
-rw-r--r--ffmpeg/libavformat/mmf.c326
1 files changed, 0 insertions, 326 deletions
diff --git a/ffmpeg/libavformat/mmf.c b/ffmpeg/libavformat/mmf.c
deleted file mode 100644
index cb87a6d..0000000
--- a/ffmpeg/libavformat/mmf.c
+++ /dev/null
@@ -1,326 +0,0 @@
-/*
- * Yamaha SMAF format
- * Copyright (c) 2005 Vidar Madsen
- *
- * 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/channel_layout.h"
-#include "avformat.h"
-#include "avio_internal.h"
-#include "internal.h"
-#include "pcm.h"
-#include "rawenc.h"
-#include "riff.h"
-
-typedef struct {
- int64_t atrpos, atsqpos, awapos;
- int64_t data_end;
- int stereo;
-} MMFContext;
-
-static const int mmf_rates[] = { 4000, 8000, 11025, 22050, 44100 };
-
-static int mmf_rate(int code)
-{
- if ((code < 0) || (code > 4))
- return -1;
- return mmf_rates[code];
-}
-
-#if CONFIG_MMF_MUXER
-static int mmf_rate_code(int rate)
-{
- int i;
- for (i = 0; i < 5; i++)
- if (mmf_rates[i] == rate)
- return i;
- return -1;
-}
-
-/* Copy of end_tag() from avienc.c, but for big-endian chunk size */
-static void end_tag_be(AVIOContext *pb, int64_t start)
-{
- int64_t pos;
-
- pos = avio_tell(pb);
- avio_seek(pb, start - 4, SEEK_SET);
- avio_wb32(pb, (uint32_t)(pos - start));
- avio_seek(pb, pos, SEEK_SET);
-}
-
-static int mmf_write_header(AVFormatContext *s)
-{
- MMFContext *mmf = s->priv_data;
- AVIOContext *pb = s->pb;
- int64_t pos;
- int rate;
- const char *version = s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT ?
- "VN:Lavf," :
- "VN:"LIBAVFORMAT_IDENT",";
-
- rate = mmf_rate_code(s->streams[0]->codec->sample_rate);
- if (rate < 0) {
- av_log(s, AV_LOG_ERROR, "Unsupported sample rate %d, supported are 4000, 8000, 11025, 22050 and 44100\n",
- s->streams[0]->codec->sample_rate);
- return AVERROR(EINVAL);
- }
-
- mmf->stereo = s->streams[0]->codec->channels > 1;
- if (mmf->stereo &&
- s->streams[0]->codec->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
- av_log(s, AV_LOG_ERROR, "Yamaha SMAF stereo is experimental, "
- "add '-strict %d' if you want to use it.\n",
- FF_COMPLIANCE_EXPERIMENTAL);
- return AVERROR(EINVAL);
- }
-
- ffio_wfourcc(pb, "MMMD");
- avio_wb32(pb, 0);
- pos = ff_start_tag(pb, "CNTI");
- avio_w8(pb, 0); /* class */
- avio_w8(pb, 1); /* type */
- avio_w8(pb, 1); /* code type */
- avio_w8(pb, 0); /* status */
- avio_w8(pb, 0); /* counts */
- end_tag_be(pb, pos);
-
- pos = ff_start_tag(pb, "OPDA");
- avio_write(pb, version, strlen(version)); /* metadata ("ST:songtitle,VN:version,...") */
- end_tag_be(pb, pos);
-
- avio_write(pb, "ATR\x00", 4);
- avio_wb32(pb, 0);
- mmf->atrpos = avio_tell(pb);
- avio_w8(pb, 0); /* format type */
- avio_w8(pb, 0); /* sequence type */
- avio_w8(pb, (mmf->stereo << 7) | (1 << 4) | rate); /* (channel << 7) | (format << 4) | rate */
- avio_w8(pb, 0); /* wave base bit */
- avio_w8(pb, 2); /* time base d */
- avio_w8(pb, 2); /* time base g */
-
- ffio_wfourcc(pb, "Atsq");
- avio_wb32(pb, 16);
- mmf->atsqpos = avio_tell(pb);
- /* Will be filled on close */
- avio_write(pb, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 16);
-
- mmf->awapos = ff_start_tag(pb, "Awa\x01");
-
- avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
-
- avio_flush(pb);
-
- return 0;
-}
-
-/* Write a variable-length symbol */
-static void put_varlength(AVIOContext *pb, int val)
-{
- if (val < 128)
- avio_w8(pb, val);
- else {
- val -= 128;
- avio_w8(pb, 0x80 | val >> 7);
- avio_w8(pb, 0x7f & val);
- }
-}
-
-static int mmf_write_trailer(AVFormatContext *s)
-{
- AVIOContext *pb = s->pb;
- MMFContext *mmf = s->priv_data;
- int64_t pos, size;
- int gatetime;
-
- if (s->pb->seekable) {
- /* Fill in length fields */
- end_tag_be(pb, mmf->awapos);
- end_tag_be(pb, mmf->atrpos);
- end_tag_be(pb, 8);
-
- pos = avio_tell(pb);
- size = pos - mmf->awapos;
-
- /* Fill Atsq chunk */
- avio_seek(pb, mmf->atsqpos, SEEK_SET);
-
- /* "play wav" */
- avio_w8(pb, 0); /* start time */
- avio_w8(pb, (mmf->stereo << 6) | 1); /* (channel << 6) | wavenum */
- gatetime = size * 500 / s->streams[0]->codec->sample_rate;
- put_varlength(pb, gatetime); /* duration */
-
- /* "nop" */
- put_varlength(pb, gatetime); /* start time */
- avio_write(pb, "\xff\x00", 2); /* nop */
-
- /* "end of sequence" */
- avio_write(pb, "\x00\x00\x00\x00", 4);
-
- avio_seek(pb, pos, SEEK_SET);
-
- avio_flush(pb);
- }
- return 0;
-}
-#endif /* CONFIG_MMF_MUXER */
-
-static int mmf_probe(AVProbeData *p)
-{
- /* check file header */
- if (p->buf[0] == 'M' && p->buf[1] == 'M' &&
- p->buf[2] == 'M' && p->buf[3] == 'D' &&
- p->buf[8] == 'C' && p->buf[9] == 'N' &&
- p->buf[10] == 'T' && p->buf[11] == 'I')
- return AVPROBE_SCORE_MAX;
- else
- return 0;
-}
-
-/* mmf input */
-static int mmf_read_header(AVFormatContext *s)
-{
- MMFContext *mmf = s->priv_data;
- unsigned int tag;
- AVIOContext *pb = s->pb;
- AVStream *st;
- int64_t size;
- int rate, params;
-
- tag = avio_rl32(pb);
- if (tag != MKTAG('M', 'M', 'M', 'D'))
- return AVERROR_INVALIDDATA;
- avio_skip(pb, 4); /* file_size */
-
- /* Skip some unused chunks that may or may not be present */
- for (;; avio_skip(pb, size)) {
- tag = avio_rl32(pb);
- size = avio_rb32(pb);
- if (tag == MKTAG('C', 'N', 'T', 'I'))
- continue;
- if (tag == MKTAG('O', 'P', 'D', 'A'))
- continue;
- break;
- }
-
- /* Tag = "ATRx", where "x" = track number */
- if ((tag & 0xffffff) == MKTAG('M', 'T', 'R', 0)) {
- av_log(s, AV_LOG_ERROR, "MIDI like format found, unsupported\n");
- return AVERROR_PATCHWELCOME;
- }
- if ((tag & 0xffffff) != MKTAG('A', 'T', 'R', 0)) {
- av_log(s, AV_LOG_ERROR, "Unsupported SMAF chunk %08x\n", tag);
- return AVERROR_PATCHWELCOME;
- }
-
- avio_r8(pb); /* format type */
- avio_r8(pb); /* sequence type */
- params = avio_r8(pb); /* (channel << 7) | (format << 4) | rate */
- rate = mmf_rate(params & 0x0f);
- if (rate < 0) {
- av_log(s, AV_LOG_ERROR, "Invalid sample rate\n");
- return AVERROR_INVALIDDATA;
- }
- avio_r8(pb); /* wave base bit */
- avio_r8(pb); /* time base d */
- avio_r8(pb); /* time base g */
-
- /* Skip some unused chunks that may or may not be present */
- for (;; avio_skip(pb, size)) {
- tag = avio_rl32(pb);
- size = avio_rb32(pb);
- if (tag == MKTAG('A', 't', 's', 'q'))
- continue;
- if (tag == MKTAG('A', 's', 'p', 'I'))
- continue;
- break;
- }
-
- /* Make sure it's followed by an Awa chunk, aka wave data */
- if ((tag & 0xffffff) != MKTAG('A', 'w', 'a', 0)) {
- av_log(s, AV_LOG_ERROR, "Unexpected SMAF chunk %08x\n", tag);
- return AVERROR_INVALIDDATA;
- }
- mmf->data_end = avio_tell(pb) + size;
-
- st = avformat_new_stream(s, NULL);
- if (!st)
- return AVERROR(ENOMEM);
-
- st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- st->codec->codec_id = AV_CODEC_ID_ADPCM_YAMAHA;
- st->codec->sample_rate = rate;
- st->codec->channels = (params >> 7) + 1;
- st->codec->channel_layout = params >> 7 ? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO;
- st->codec->bits_per_coded_sample = 4;
- st->codec->bit_rate = st->codec->sample_rate *
- st->codec->bits_per_coded_sample;
-
- avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
-
- return 0;
-}
-
-#define MAX_SIZE 4096
-
-static int mmf_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
- MMFContext *mmf = s->priv_data;
- int64_t left, size;
- int ret;
-
- left = mmf->data_end - avio_tell(s->pb);
- size = FFMIN(left, MAX_SIZE);
- if (url_feof(s->pb) || size <= 0)
- return AVERROR_EOF;
-
- ret = av_get_packet(s->pb, pkt, size);
- if (ret < 0)
- return ret;
-
- pkt->stream_index = 0;
-
- return ret;
-}
-
-#if CONFIG_MMF_DEMUXER
-AVInputFormat ff_mmf_demuxer = {
- .name = "mmf",
- .long_name = NULL_IF_CONFIG_SMALL("Yamaha SMAF"),
- .priv_data_size = sizeof(MMFContext),
- .read_probe = mmf_probe,
- .read_header = mmf_read_header,
- .read_packet = mmf_read_packet,
- .flags = AVFMT_GENERIC_INDEX,
-};
-#endif
-
-#if CONFIG_MMF_MUXER
-AVOutputFormat ff_mmf_muxer = {
- .name = "mmf",
- .long_name = NULL_IF_CONFIG_SMALL("Yamaha SMAF"),
- .mime_type = "application/vnd.smaf",
- .extensions = "mmf",
- .priv_data_size = sizeof(MMFContext),
- .audio_codec = AV_CODEC_ID_ADPCM_YAMAHA,
- .video_codec = AV_CODEC_ID_NONE,
- .write_header = mmf_write_header,
- .write_packet = ff_raw_write_packet,
- .write_trailer = mmf_write_trailer,
-};
-#endif
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 16:50:05 +0000