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/*
* AIFF/AIFF-C muxer
* Copyright (c) 2006 Patrick Guimond
*
* 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 <stdint.h>
#include "libavutil/intfloat.h"
#include "libavutil/opt.h"
#include "avformat.h"
#include "internal.h"
#include "aiff.h"
#include "avio_internal.h"
#include "isom.h"
#include "id3v2.h"
typedef struct {
const AVClass *class;
int64_t form;
int64_t frames;
int64_t ssnd;
int audio_stream_idx;
AVPacketList *pict_list;
int write_id3v2;
int id3v2_version;
} AIFFOutputContext;
static int put_id3v2_tags(AVFormatContext *s, AIFFOutputContext *aiff)
{
int ret;
uint64_t pos, end, size;
ID3v2EncContext id3v2 = { 0 };
AVIOContext *pb = s->pb;
AVPacketList *pict_list = aiff->pict_list;
if (!pb->seekable)
return 0;
if (!s->metadata && !aiff->pict_list)
return 0;
avio_wl32(pb, MKTAG('I', 'D', '3', ' '));
avio_wb32(pb, 0);
pos = avio_tell(pb);
ff_id3v2_start(&id3v2, pb, aiff->id3v2_version, ID3v2_DEFAULT_MAGIC);
ff_id3v2_write_metadata(s, &id3v2);
while (pict_list) {
if ((ret = ff_id3v2_write_apic(s, &id3v2, &pict_list->pkt)) < 0)
return ret;
pict_list = pict_list->next;
}
ff_id3v2_finish(&id3v2, pb, s->metadata_header_padding);
end = avio_tell(pb);
size = end - pos;
/* Update chunk size */
avio_seek(pb, pos - 4, SEEK_SET);
avio_wb32(pb, size);
avio_seek(pb, end, SEEK_SET);
if (size & 1)
avio_w8(pb, 0);
return 0;
}
static void put_meta(AVFormatContext *s, const char *key, uint32_t id)
{
AVDictionaryEntry *tag;
AVIOContext *pb = s->pb;
if (tag = av_dict_get(s->metadata, key, NULL, 0)) {
int size = strlen(tag->value);
avio_wl32(pb, id);
avio_wb32(pb, FFALIGN(size, 2));
avio_write(pb, tag->value, size);
if (size & 1)
avio_w8(pb, 0);
}
}
static int aiff_write_header(AVFormatContext *s)
{
AIFFOutputContext *aiff = s->priv_data;
AVIOContext *pb = s->pb;
AVCodecContext *enc;
uint64_t sample_rate;
int i, aifc = 0;
aiff->audio_stream_idx = -1;
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
if (aiff->audio_stream_idx < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
aiff->audio_stream_idx = i;
} else if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO) {
av_log(s, AV_LOG_ERROR, "Only audio streams and pictures are allowed in AIFF.\n");
return AVERROR(EINVAL);
}
}
if (aiff->audio_stream_idx < 0) {
av_log(s, AV_LOG_ERROR, "No audio stream present.\n");
return AVERROR(EINVAL);
}
enc = s->streams[aiff->audio_stream_idx]->codec;
/* First verify if format is ok */
if (!enc->codec_tag)
return -1;
if (enc->codec_tag != MKTAG('N','O','N','E'))
aifc = 1;
/* FORM AIFF header */
ffio_wfourcc(pb, "FORM");
aiff->form = avio_tell(pb);
avio_wb32(pb, 0); /* file length */
ffio_wfourcc(pb, aifc ? "AIFC" : "AIFF");
if (aifc) { // compressed audio
if (!enc->block_align) {
av_log(s, AV_LOG_ERROR, "block align not set\n");
return -1;
}
/* Version chunk */
ffio_wfourcc(pb, "FVER");
avio_wb32(pb, 4);
avio_wb32(pb, 0xA2805140);
}
if (enc->channels > 2 && enc->channel_layout) {
ffio_wfourcc(pb, "CHAN");
avio_wb32(pb, 12);
ff_mov_write_chan(pb, enc->channel_layout);
}
put_meta(s, "title", MKTAG('N', 'A', 'M', 'E'));
put_meta(s, "author", MKTAG('A', 'U', 'T', 'H'));
put_meta(s, "copyright", MKTAG('(', 'c', ')', ' '));
put_meta(s, "comment", MKTAG('A', 'N', 'N', 'O'));
/* Common chunk */
ffio_wfourcc(pb, "COMM");
avio_wb32(pb, aifc ? 24 : 18); /* size */
avio_wb16(pb, enc->channels); /* Number of channels */
aiff->frames = avio_tell(pb);
avio_wb32(pb, 0); /* Number of frames */
if (!enc->bits_per_coded_sample)
enc->bits_per_coded_sample = av_get_bits_per_sample(enc->codec_id);
if (!enc->bits_per_coded_sample) {
av_log(s, AV_LOG_ERROR, "could not compute bits per sample\n");
return -1;
}
if (!enc->block_align)
enc->block_align = (enc->bits_per_coded_sample * enc->channels) >> 3;
avio_wb16(pb, enc->bits_per_coded_sample); /* Sample size */
sample_rate = av_double2int(enc->sample_rate);
avio_wb16(pb, (sample_rate >> 52) + (16383 - 1023));
avio_wb64(pb, UINT64_C(1) << 63 | sample_rate << 11);
if (aifc) {
avio_wl32(pb, enc->codec_tag);
avio_wb16(pb, 0);
}
if (enc->codec_tag == MKTAG('Q','D','M','2') && enc->extradata_size) {
ffio_wfourcc(pb, "wave");
avio_wb32(pb, enc->extradata_size);
avio_write(pb, enc->extradata, enc->extradata_size);
}
/* Sound data chunk */
ffio_wfourcc(pb, "SSND");
aiff->ssnd = avio_tell(pb); /* Sound chunk size */
avio_wb32(pb, 0); /* Sound samples data size */
avio_wb32(pb, 0); /* Data offset */
avio_wb32(pb, 0); /* Block-size (block align) */
avpriv_set_pts_info(s->streams[aiff->audio_stream_idx], 64, 1,
s->streams[aiff->audio_stream_idx]->codec->sample_rate);
/* Data is starting here */
avio_flush(pb);
return 0;
}
static int aiff_write_packet(AVFormatContext *s, AVPacket *pkt)
{
AIFFOutputContext *aiff = s->priv_data;
AVIOContext *pb = s->pb;
if (pkt->stream_index == aiff->audio_stream_idx)
avio_write(pb, pkt->data, pkt->size);
else {
int ret;
AVPacketList *pict_list, *last;
if (s->streams[pkt->stream_index]->codec->codec_type != AVMEDIA_TYPE_VIDEO)
return 0;
/* warn only once for each stream */
if (s->streams[pkt->stream_index]->nb_frames == 1) {
av_log(s, AV_LOG_WARNING, "Got more than one picture in stream %d,"
" ignoring.\n", pkt->stream_index);
}
if (s->streams[pkt->stream_index]->nb_frames >= 1)
return 0;
pict_list = av_mallocz(sizeof(AVPacketList));
if (!pict_list)
return AVERROR(ENOMEM);
if ((ret = av_copy_packet(&pict_list->pkt, pkt)) < 0) {
av_freep(&pict_list);
return ret;
}
if (!aiff->pict_list)
aiff->pict_list = pict_list;
else {
last = aiff->pict_list;
while (last->next)
last = last->next;
last->next = pict_list;
}
}
return 0;
}
static int aiff_write_trailer(AVFormatContext *s)
{
int ret;
AVIOContext *pb = s->pb;
AIFFOutputContext *aiff = s->priv_data;
AVPacketList *pict_list = aiff->pict_list;
AVCodecContext *enc = s->streams[aiff->audio_stream_idx]->codec;
/* Chunks sizes must be even */
int64_t file_size, end_size;
end_size = file_size = avio_tell(pb);
if (file_size & 1) {
avio_w8(pb, 0);
end_size++;
}
if (s->pb->seekable) {
/* Number of sample frames */
avio_seek(pb, aiff->frames, SEEK_SET);
avio_wb32(pb, (file_size-aiff->ssnd-12)/enc->block_align);
/* Sound Data chunk size */
avio_seek(pb, aiff->ssnd, SEEK_SET);
avio_wb32(pb, file_size - aiff->ssnd - 4);
/* return to the end */
avio_seek(pb, end_size, SEEK_SET);
/* Write ID3 tags */
if (aiff->write_id3v2)
if ((ret = put_id3v2_tags(s, aiff)) < 0)
return ret;
/* File length */
file_size = avio_tell(pb);
avio_seek(pb, aiff->form, SEEK_SET);
avio_wb32(pb, file_size - aiff->form - 4);
avio_flush(pb);
}
while (pict_list) {
AVPacketList *next = pict_list->next;
av_free_packet(&pict_list->pkt);
av_freep(&pict_list);
pict_list = next;
}
return 0;
}
#define OFFSET(x) offsetof(AIFFOutputContext, x)
#define ENC AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{ "write_id3v2", "Enable ID3 tags writing.",
OFFSET(write_id3v2), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, ENC },
{ "id3v2_version", "Select ID3v2 version to write. Currently 3 and 4 are supported.",
OFFSET(id3v2_version), AV_OPT_TYPE_INT, {.i64 = 4}, 3, 4, ENC },
{ NULL },
};
static const AVClass aiff_muxer_class = {
.class_name = "AIFF muxer",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
AVOutputFormat ff_aiff_muxer = {
.name = "aiff",
.long_name = NULL_IF_CONFIG_SMALL("Audio IFF"),
.mime_type = "audio/aiff",
.extensions = "aif,aiff,afc,aifc",
.priv_data_size = sizeof(AIFFOutputContext),
.audio_codec = AV_CODEC_ID_PCM_S16BE,
.video_codec = AV_CODEC_ID_PNG,
.write_header = aiff_write_header,
.write_packet = aiff_write_packet,
.write_trailer = aiff_write_trailer,
.codec_tag = (const AVCodecTag* const []){ ff_codec_aiff_tags, 0 },
.priv_class = &aiff_muxer_class,
};
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