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