mirror of
https://git.ffmpeg.org/ffmpeg.git
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59c9dc82f4
This commit does for AVOutputFormat what commit
20f9727018 did for AVCodec:
It adds a new type FFOutputFormat, moves all the internals
of AVOutputFormat to it and adds a now reduced AVOutputFormat
as first member.
This does not affect/improve extensibility of both public
or private fields for muxers (it is still a mess due to lavd).
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
282 lines
8.6 KiB
C
282 lines
8.6 KiB
C
/*
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* amr file format
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* Copyright (c) 2001 FFmpeg project
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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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/*
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Write and read amr data according to RFC3267, http://www.ietf.org/rfc/rfc3267.txt?number=3267
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*/
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#include "config_components.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/intreadwrite.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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#include "mux.h"
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#include "rawdec.h"
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#include "rawenc.h"
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typedef struct AMRContext {
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FFRawDemuxerContext rawctx;
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} AMRContext;
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static const uint8_t AMR_header[6] = "#!AMR\x0a";
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static const uint8_t AMRMC_header[12] = "#!AMR_MC1.0\x0a";
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static const uint8_t AMRWB_header[9] = "#!AMR-WB\x0a";
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static const uint8_t AMRWBMC_header[15] = "#!AMR-WB_MC1.0\x0a";
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static const uint8_t amrnb_packed_size[16] = {
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13, 14, 16, 18, 20, 21, 27, 32, 6, 1, 1, 1, 1, 1, 1, 1
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};
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static const uint8_t amrwb_packed_size[16] = {
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18, 24, 33, 37, 41, 47, 51, 59, 61, 6, 1, 1, 1, 1, 1, 1
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};
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#if CONFIG_AMR_MUXER
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static int amr_write_header(AVFormatContext *s)
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{
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AVIOContext *pb = s->pb;
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AVCodecParameters *par = s->streams[0]->codecpar;
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if (par->codec_id == AV_CODEC_ID_AMR_NB) {
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avio_write(pb, AMR_header, sizeof(AMR_header)); /* magic number */
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} else if (par->codec_id == AV_CODEC_ID_AMR_WB) {
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avio_write(pb, AMRWB_header, sizeof(AMRWB_header)); /* magic number */
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} else {
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return -1;
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}
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return 0;
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}
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#endif /* CONFIG_AMR_MUXER */
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#if CONFIG_AMR_DEMUXER
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static int amr_probe(const AVProbeData *p)
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{
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// Only check for "#!AMR" which could be amr-wb, amr-nb.
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// This will also trigger multichannel files: "#!AMR_MC1.0\n" and
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// "#!AMR-WB_MC1.0\n"
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if (!memcmp(p->buf, AMR_header, 5))
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return AVPROBE_SCORE_MAX;
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else
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return 0;
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}
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/* amr input */
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static int amr_read_header(AVFormatContext *s)
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{
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AVIOContext *pb = s->pb;
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AVStream *st;
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uint8_t header[19] = { 0 };
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int read, back = 0, ret;
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ret = ffio_ensure_seekback(s->pb, sizeof(header));
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if (ret < 0)
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return ret;
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read = avio_read(pb, header, sizeof(header));
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if (read < 0)
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return read;
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st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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if (!memcmp(header, AMR_header, sizeof(AMR_header))) {
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st->codecpar->codec_tag = MKTAG('s', 'a', 'm', 'r');
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st->codecpar->codec_id = AV_CODEC_ID_AMR_NB;
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st->codecpar->sample_rate = 8000;
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st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
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back = read - sizeof(AMR_header);
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} else if (!memcmp(header, AMRWB_header, sizeof(AMRWB_header))) {
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st->codecpar->codec_tag = MKTAG('s', 'a', 'w', 'b');
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st->codecpar->codec_id = AV_CODEC_ID_AMR_WB;
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st->codecpar->sample_rate = 16000;
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st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
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back = read - sizeof(AMRWB_header);
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} else if (!memcmp(header, AMRMC_header, sizeof(AMRMC_header))) {
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st->codecpar->codec_tag = MKTAG('s', 'a', 'm', 'r');
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st->codecpar->codec_id = AV_CODEC_ID_AMR_NB;
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st->codecpar->sample_rate = 8000;
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st->codecpar->ch_layout.nb_channels = AV_RL32(header + 12);
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back = read - 4 - sizeof(AMRMC_header);
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} else if (!memcmp(header, AMRWBMC_header, sizeof(AMRWBMC_header))) {
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st->codecpar->codec_tag = MKTAG('s', 'a', 'w', 'b');
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st->codecpar->codec_id = AV_CODEC_ID_AMR_WB;
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st->codecpar->sample_rate = 16000;
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st->codecpar->ch_layout.nb_channels = AV_RL32(header + 15);
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back = read - 4 - sizeof(AMRWBMC_header);
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} else {
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return AVERROR_INVALIDDATA;
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}
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if (st->codecpar->ch_layout.nb_channels < 1)
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return AVERROR_INVALIDDATA;
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
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avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
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if (back > 0)
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avio_seek(pb, -back, SEEK_CUR);
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return 0;
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}
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const AVInputFormat ff_amr_demuxer = {
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.name = "amr",
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.long_name = NULL_IF_CONFIG_SMALL("3GPP AMR"),
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.priv_data_size = sizeof(AMRContext),
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.read_probe = amr_probe,
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.read_header = amr_read_header,
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.read_packet = ff_raw_read_partial_packet,
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.flags = AVFMT_GENERIC_INDEX,
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.priv_class = &ff_raw_demuxer_class,
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};
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#endif
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#if CONFIG_AMRNB_DEMUXER
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static int amrnb_probe(const AVProbeData *p)
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{
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int mode, i = 0, valid = 0, invalid = 0;
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const uint8_t *b = p->buf;
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while (i < p->buf_size) {
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mode = b[i] >> 3 & 0x0F;
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if (mode < 9 && (b[i] & 0x4) == 0x4) {
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int last = b[i];
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int size = amrnb_packed_size[mode];
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while (size--) {
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if (b[++i] != last)
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break;
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}
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if (size > 0) {
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valid++;
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i += size;
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}
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} else {
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valid = 0;
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invalid++;
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i++;
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}
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}
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if (valid > 100 && valid >> 4 > invalid)
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return AVPROBE_SCORE_EXTENSION / 2 + 1;
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return 0;
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}
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static int amrnb_read_header(AVFormatContext *s)
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{
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AVStream *st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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st->codecpar->codec_id = AV_CODEC_ID_AMR_NB;
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st->codecpar->sample_rate = 8000;
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st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
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avpriv_set_pts_info(st, 64, 1, 8000);
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return 0;
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}
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const AVInputFormat ff_amrnb_demuxer = {
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.name = "amrnb",
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.long_name = NULL_IF_CONFIG_SMALL("raw AMR-NB"),
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.priv_data_size = sizeof(AMRContext),
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.read_probe = amrnb_probe,
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.read_header = amrnb_read_header,
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.read_packet = ff_raw_read_partial_packet,
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.flags = AVFMT_GENERIC_INDEX,
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.priv_class = &ff_raw_demuxer_class,
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};
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#endif
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#if CONFIG_AMRWB_DEMUXER
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static int amrwb_probe(const AVProbeData *p)
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{
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int mode, i = 0, valid = 0, invalid = 0;
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const uint8_t *b = p->buf;
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while (i < p->buf_size) {
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mode = b[i] >> 3 & 0x0F;
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if (mode < 10 && (b[i] & 0x4) == 0x4) {
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int last = b[i];
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int size = amrwb_packed_size[mode];
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while (size--) {
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if (b[++i] != last)
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break;
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}
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if (size > 0) {
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valid++;
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i += size;
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}
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} else {
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valid = 0;
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invalid++;
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i++;
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}
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}
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if (valid > 100 && valid >> 4 > invalid)
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return AVPROBE_SCORE_EXTENSION / 2 + 1;
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return 0;
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}
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static int amrwb_read_header(AVFormatContext *s)
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{
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AVStream *st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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st->codecpar->codec_id = AV_CODEC_ID_AMR_WB;
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st->codecpar->sample_rate = 16000;
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st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
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avpriv_set_pts_info(st, 64, 1, 16000);
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return 0;
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}
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const AVInputFormat ff_amrwb_demuxer = {
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.name = "amrwb",
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.long_name = NULL_IF_CONFIG_SMALL("raw AMR-WB"),
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.priv_data_size = sizeof(AMRContext),
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.read_probe = amrwb_probe,
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.read_header = amrwb_read_header,
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.read_packet = ff_raw_read_partial_packet,
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.flags = AVFMT_GENERIC_INDEX,
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.priv_class = &ff_raw_demuxer_class,
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};
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#endif
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#if CONFIG_AMR_MUXER
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const FFOutputFormat ff_amr_muxer = {
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.p.name = "amr",
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.p.long_name = NULL_IF_CONFIG_SMALL("3GPP AMR"),
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.p.mime_type = "audio/amr",
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.p.extensions = "amr",
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.p.audio_codec = AV_CODEC_ID_AMR_NB,
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.p.video_codec = AV_CODEC_ID_NONE,
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.p.flags = AVFMT_NOTIMESTAMPS,
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.write_header = amr_write_header,
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.write_packet = ff_raw_write_packet,
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};
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#endif
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