yading@11: /*
yading@11:  * AIFF/AIFF-C muxer
yading@11:  * Copyright (c) 2006  Patrick Guimond
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #include "libavutil/intfloat.h"
yading@11: #include "libavutil/opt.h"
yading@11: #include "avformat.h"
yading@11: #include "internal.h"
yading@11: #include "aiff.h"
yading@11: #include "avio_internal.h"
yading@11: #include "isom.h"
yading@11: #include "id3v2.h"
yading@11: 
yading@11: typedef struct {
yading@11:     const AVClass *class;
yading@11:     int64_t form;
yading@11:     int64_t frames;
yading@11:     int64_t ssnd;
yading@11:     int audio_stream_idx;
yading@11:     AVPacketList *pict_list;
yading@11:     int write_id3v2;
yading@11:     int id3v2_version;
yading@11: } AIFFOutputContext;
yading@11: 
yading@11: static int put_id3v2_tags(AVFormatContext *s, AIFFOutputContext *aiff)
yading@11: {
yading@11:     int ret;
yading@11:     uint64_t pos, end, size;
yading@11:     ID3v2EncContext id3v2 = { 0 };
yading@11:     AVIOContext *pb = s->pb;
yading@11:     AVPacketList *pict_list = aiff->pict_list;
yading@11: 
yading@11:     if (!pb->seekable)
yading@11:         return 0;
yading@11: 
yading@11:     if (!s->metadata && !aiff->pict_list)
yading@11:         return 0;
yading@11: 
yading@11:     avio_wl32(pb, MKTAG('I', 'D', '3', ' '));
yading@11:     avio_wb32(pb, 0);
yading@11:     pos = avio_tell(pb);
yading@11: 
yading@11:     ff_id3v2_start(&id3v2, pb, aiff->id3v2_version, ID3v2_DEFAULT_MAGIC);
yading@11:     ff_id3v2_write_metadata(s, &id3v2);
yading@11:     while (pict_list) {
yading@11:         if ((ret = ff_id3v2_write_apic(s, &id3v2, &pict_list->pkt)) < 0)
yading@11:             return ret;
yading@11:         pict_list = pict_list->next;
yading@11:     }
yading@11:     ff_id3v2_finish(&id3v2, pb);
yading@11: 
yading@11:     end = avio_tell(pb);
yading@11:     size = end - pos;
yading@11: 
yading@11:     /* Update chunk size */
yading@11:     avio_seek(pb, pos - 4, SEEK_SET);
yading@11:     avio_wb32(pb, size);
yading@11:     avio_seek(pb, end, SEEK_SET);
yading@11: 
yading@11:     if (size & 1)
yading@11:         avio_w8(pb, 0);
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static void put_meta(AVFormatContext *s, const char *key, uint32_t id)
yading@11: {
yading@11:     AVDictionaryEntry *tag;
yading@11:     AVIOContext *pb = s->pb;
yading@11: 
yading@11:     if (tag = av_dict_get(s->metadata, key, NULL, 0)) {
yading@11:         int size = strlen(tag->value);
yading@11: 
yading@11:         avio_wl32(pb, id);
yading@11:         avio_wb32(pb, FFALIGN(size, 2));
yading@11:         avio_write(pb, tag->value, size);
yading@11:         if (size & 1)
yading@11:             avio_w8(pb, 0);
yading@11:     }
yading@11: }
yading@11: 
yading@11: static int aiff_write_header(AVFormatContext *s)
yading@11: {
yading@11:     AIFFOutputContext *aiff = s->priv_data;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     AVCodecContext *enc;
yading@11:     uint64_t sample_rate;
yading@11:     int i, aifc = 0;
yading@11: 
yading@11:     aiff->audio_stream_idx = -1;
yading@11:     for (i = 0; i < s->nb_streams; i++) {
yading@11:         AVStream *st = s->streams[i];
yading@11:         if (aiff->audio_stream_idx < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
yading@11:             aiff->audio_stream_idx = i;
yading@11:         } else if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO) {
yading@11:             av_log(s, AV_LOG_ERROR, "Only audio streams and pictures are allowed in AIFF.\n");
yading@11:             return AVERROR(EINVAL);
yading@11:         }
yading@11:     }
yading@11:     if (aiff->audio_stream_idx < 0) {
yading@11:         av_log(s, AV_LOG_ERROR, "No audio stream present.\n");
yading@11:         return AVERROR(EINVAL);
yading@11:     }
yading@11: 
yading@11:     enc = s->streams[aiff->audio_stream_idx]->codec;
yading@11: 
yading@11:     /* First verify if format is ok */
yading@11:     if (!enc->codec_tag)
yading@11:         return -1;
yading@11:     if (enc->codec_tag != MKTAG('N','O','N','E'))
yading@11:         aifc = 1;
yading@11: 
yading@11:     /* FORM AIFF header */
yading@11:     ffio_wfourcc(pb, "FORM");
yading@11:     aiff->form = avio_tell(pb);
yading@11:     avio_wb32(pb, 0);                    /* file length */
yading@11:     ffio_wfourcc(pb, aifc ? "AIFC" : "AIFF");
yading@11: 
yading@11:     if (aifc) { // compressed audio
yading@11:         if (!enc->block_align) {
yading@11:             av_log(s, AV_LOG_ERROR, "block align not set\n");
yading@11:             return -1;
yading@11:         }
yading@11:         /* Version chunk */
yading@11:         ffio_wfourcc(pb, "FVER");
yading@11:         avio_wb32(pb, 4);
yading@11:         avio_wb32(pb, 0xA2805140);
yading@11:     }
yading@11: 
yading@11:     if (enc->channels > 2 && enc->channel_layout) {
yading@11:         ffio_wfourcc(pb, "CHAN");
yading@11:         avio_wb32(pb, 12);
yading@11:         ff_mov_write_chan(pb, enc->channel_layout);
yading@11:     }
yading@11: 
yading@11:     put_meta(s, "title",     MKTAG('N', 'A', 'M', 'E'));
yading@11:     put_meta(s, "author",    MKTAG('A', 'U', 'T', 'H'));
yading@11:     put_meta(s, "copyright", MKTAG('(', 'c', ')', ' '));
yading@11:     put_meta(s, "comment",   MKTAG('A', 'N', 'N', 'O'));
yading@11: 
yading@11:     /* Common chunk */
yading@11:     ffio_wfourcc(pb, "COMM");
yading@11:     avio_wb32(pb, aifc ? 24 : 18); /* size */
yading@11:     avio_wb16(pb, enc->channels);  /* Number of channels */
yading@11: 
yading@11:     aiff->frames = avio_tell(pb);
yading@11:     avio_wb32(pb, 0);              /* Number of frames */
yading@11: 
yading@11:     if (!enc->bits_per_coded_sample)
yading@11:         enc->bits_per_coded_sample = av_get_bits_per_sample(enc->codec_id);
yading@11:     if (!enc->bits_per_coded_sample) {
yading@11:         av_log(s, AV_LOG_ERROR, "could not compute bits per sample\n");
yading@11:         return -1;
yading@11:     }
yading@11:     if (!enc->block_align)
yading@11:         enc->block_align = (enc->bits_per_coded_sample * enc->channels) >> 3;
yading@11: 
yading@11:     avio_wb16(pb, enc->bits_per_coded_sample); /* Sample size */
yading@11: 
yading@11:     sample_rate = av_double2int(enc->sample_rate);
yading@11:     avio_wb16(pb, (sample_rate >> 52) + (16383 - 1023));
yading@11:     avio_wb64(pb, UINT64_C(1) << 63 | sample_rate << 11);
yading@11: 
yading@11:     if (aifc) {
yading@11:         avio_wl32(pb, enc->codec_tag);
yading@11:         avio_wb16(pb, 0);
yading@11:     }
yading@11: 
yading@11:     if (enc->codec_tag == MKTAG('Q','D','M','2') && enc->extradata_size) {
yading@11:         ffio_wfourcc(pb, "wave");
yading@11:         avio_wb32(pb, enc->extradata_size);
yading@11:         avio_write(pb, enc->extradata, enc->extradata_size);
yading@11:     }
yading@11: 
yading@11:     /* Sound data chunk */
yading@11:     ffio_wfourcc(pb, "SSND");
yading@11:     aiff->ssnd = avio_tell(pb);         /* Sound chunk size */
yading@11:     avio_wb32(pb, 0);                    /* Sound samples data size */
yading@11:     avio_wb32(pb, 0);                    /* Data offset */
yading@11:     avio_wb32(pb, 0);                    /* Block-size (block align) */
yading@11: 
yading@11:     avpriv_set_pts_info(s->streams[aiff->audio_stream_idx], 64, 1,
yading@11:                         s->streams[aiff->audio_stream_idx]->codec->sample_rate);
yading@11: 
yading@11:     /* Data is starting here */
yading@11:     avio_flush(pb);
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int aiff_write_packet(AVFormatContext *s, AVPacket *pkt)
yading@11: {
yading@11:     AIFFOutputContext *aiff = s->priv_data;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     if (pkt->stream_index == aiff->audio_stream_idx)
yading@11:         avio_write(pb, pkt->data, pkt->size);
yading@11:     else {
yading@11:         int ret;
yading@11:         AVPacketList *pict_list, *last;
yading@11: 
yading@11:         if (s->streams[pkt->stream_index]->codec->codec_type != AVMEDIA_TYPE_VIDEO)
yading@11:             return 0;
yading@11: 
yading@11:         /* warn only once for each stream */
yading@11:         if (s->streams[pkt->stream_index]->nb_frames == 1) {
yading@11:             av_log(s, AV_LOG_WARNING, "Got more than one picture in stream %d,"
yading@11:                    " ignoring.\n", pkt->stream_index);
yading@11:         }
yading@11:         if (s->streams[pkt->stream_index]->nb_frames >= 1)
yading@11:             return 0;
yading@11: 
yading@11:         pict_list = av_mallocz(sizeof(AVPacketList));
yading@11:         if (!pict_list)
yading@11:             return AVERROR(ENOMEM);
yading@11: 
yading@11:         if ((ret = av_copy_packet(&pict_list->pkt, pkt)) < 0) {
yading@11:             av_freep(&pict_list);
yading@11:             return ret;
yading@11:         }
yading@11: 
yading@11:         if (!aiff->pict_list)
yading@11:             aiff->pict_list = pict_list;
yading@11:         else {
yading@11:             last = aiff->pict_list;
yading@11:             while (last->next)
yading@11:                 last = last->next;
yading@11:             last->next = pict_list;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int aiff_write_trailer(AVFormatContext *s)
yading@11: {
yading@11:     int ret;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     AIFFOutputContext *aiff = s->priv_data;
yading@11:     AVPacketList *pict_list = aiff->pict_list;
yading@11:     AVCodecContext *enc = s->streams[aiff->audio_stream_idx]->codec;
yading@11: 
yading@11:     /* Chunks sizes must be even */
yading@11:     int64_t file_size, end_size;
yading@11:     end_size = file_size = avio_tell(pb);
yading@11:     if (file_size & 1) {
yading@11:         avio_w8(pb, 0);
yading@11:         end_size++;
yading@11:     }
yading@11: 
yading@11:     if (s->pb->seekable) {
yading@11:         /* Number of sample frames */
yading@11:         avio_seek(pb, aiff->frames, SEEK_SET);
yading@11:         avio_wb32(pb, (file_size-aiff->ssnd-12)/enc->block_align);
yading@11: 
yading@11:         /* Sound Data chunk size */
yading@11:         avio_seek(pb, aiff->ssnd, SEEK_SET);
yading@11:         avio_wb32(pb, file_size - aiff->ssnd - 4);
yading@11: 
yading@11:         /* return to the end */
yading@11:         avio_seek(pb, end_size, SEEK_SET);
yading@11: 
yading@11:         /* Write ID3 tags */
yading@11:         if (aiff->write_id3v2)
yading@11:             if ((ret = put_id3v2_tags(s, aiff)) < 0)
yading@11:                 return ret;
yading@11: 
yading@11:         /* File length */
yading@11:         file_size = avio_tell(pb);
yading@11:         avio_seek(pb, aiff->form, SEEK_SET);
yading@11:         avio_wb32(pb, file_size - aiff->form - 4);
yading@11: 
yading@11:         avio_flush(pb);
yading@11:     }
yading@11: 
yading@11:     while (pict_list) {
yading@11:         AVPacketList *next = pict_list->next;
yading@11:         av_free_packet(&pict_list->pkt);
yading@11:         av_freep(&pict_list);
yading@11:         pict_list = next;
yading@11:     }
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: #define OFFSET(x) offsetof(AIFFOutputContext, x)
yading@11: #define ENC AV_OPT_FLAG_ENCODING_PARAM
yading@11: static const AVOption options[] = {
yading@11:     { "write_id3v2", "Enable ID3 tags writing.",
yading@11:       OFFSET(write_id3v2), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, ENC },
yading@11:     { "id3v2_version", "Select ID3v2 version to write. Currently 3 and 4 are supported.",
yading@11:       OFFSET(id3v2_version), AV_OPT_TYPE_INT, {.i64 = 4}, 3, 4, ENC },
yading@11:     { NULL },
yading@11: };
yading@11: 
yading@11: static const AVClass aiff_muxer_class = {
yading@11:     .class_name     = "AIFF muxer",
yading@11:     .item_name      = av_default_item_name,
yading@11:     .option         = options,
yading@11:     .version        = LIBAVUTIL_VERSION_INT,
yading@11: };
yading@11: 
yading@11: AVOutputFormat ff_aiff_muxer = {
yading@11:     .name              = "aiff",
yading@11:     .long_name         = NULL_IF_CONFIG_SMALL("Audio IFF"),
yading@11:     .mime_type         = "audio/aiff",
yading@11:     .extensions        = "aif,aiff,afc,aifc",
yading@11:     .priv_data_size    = sizeof(AIFFOutputContext),
yading@11:     .audio_codec       = AV_CODEC_ID_PCM_S16BE,
yading@11:     .video_codec       = AV_CODEC_ID_PNG,
yading@11:     .write_header      = aiff_write_header,
yading@11:     .write_packet      = aiff_write_packet,
yading@11:     .write_trailer     = aiff_write_trailer,
yading@11:     .codec_tag         = (const AVCodecTag* const []){ ff_codec_aiff_tags, 0 },
yading@11:     .priv_class        = &aiff_muxer_class,
yading@11: };