mirror of https://github.com/FFmpeg/FFmpeg.git
Signed-off-by: Mans Rullgard <mans@mansr.com>oldabi
Anton Khirnov
14 years ago
committed by
Mans Rullgard
parent
2611e52088
commit
d08928bbea
3 changed files with 198 additions and 180 deletions
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/*
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* MP3 muxer |
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* Copyright (c) 2003 Fabrice Bellard |
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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 <strings.h> |
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#include "avformat.h" |
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#include "id3v1.h" |
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#include "id3v2.h" |
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#include "libavutil/intreadwrite.h" |
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static int id3v1_set_string(AVFormatContext *s, const char *key, |
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uint8_t *buf, int buf_size) |
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{ |
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AVMetadataTag *tag; |
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if ((tag = av_metadata_get(s->metadata, key, NULL, 0))) |
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strncpy(buf, tag->value, buf_size); |
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return !!tag; |
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} |
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static int id3v1_create_tag(AVFormatContext *s, uint8_t *buf) |
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{ |
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AVMetadataTag *tag; |
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int i, count = 0; |
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memset(buf, 0, ID3v1_TAG_SIZE); /* fail safe */ |
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buf[0] = 'T'; |
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buf[1] = 'A'; |
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buf[2] = 'G'; |
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count += id3v1_set_string(s, "TIT2", buf + 3, 30); //title
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count += id3v1_set_string(s, "TPE1", buf + 33, 30); //author|artist
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count += id3v1_set_string(s, "TALB", buf + 63, 30); //album
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count += id3v1_set_string(s, "TDRL", buf + 93, 4); //date
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count += id3v1_set_string(s, "comment", buf + 97, 30); |
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if ((tag = av_metadata_get(s->metadata, "TRCK", NULL, 0))) { //track
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buf[125] = 0; |
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buf[126] = atoi(tag->value); |
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count++; |
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} |
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buf[127] = 0xFF; /* default to unknown genre */ |
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if ((tag = av_metadata_get(s->metadata, "TCON", NULL, 0))) { //genre
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for(i = 0; i <= ID3v1_GENRE_MAX; i++) { |
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if (!strcasecmp(tag->value, ff_id3v1_genre_str[i])) { |
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buf[127] = i; |
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count++; |
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break; |
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} |
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} |
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} |
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return count; |
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} |
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/* simple formats */ |
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static void id3v2_put_size(AVFormatContext *s, int size) |
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{ |
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put_byte(s->pb, size >> 21 & 0x7f); |
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put_byte(s->pb, size >> 14 & 0x7f); |
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put_byte(s->pb, size >> 7 & 0x7f); |
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put_byte(s->pb, size & 0x7f); |
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} |
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static void id3v2_put_ttag(AVFormatContext *s, const char *buf, int len, |
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uint32_t tag) |
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{ |
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put_be32(s->pb, tag); |
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id3v2_put_size(s, len + 1); |
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put_be16(s->pb, 0); |
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put_byte(s->pb, 3); /* UTF-8 */ |
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put_buffer(s->pb, buf, len); |
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} |
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static int mp3_write_packet(struct AVFormatContext *s, AVPacket *pkt) |
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{ |
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put_buffer(s->pb, pkt->data, pkt->size); |
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put_flush_packet(s->pb); |
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return 0; |
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} |
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static int mp3_write_trailer(struct AVFormatContext *s) |
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{ |
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uint8_t buf[ID3v1_TAG_SIZE]; |
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/* write the id3v1 tag */ |
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if (id3v1_create_tag(s, buf) > 0) { |
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put_buffer(s->pb, buf, ID3v1_TAG_SIZE); |
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put_flush_packet(s->pb); |
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} |
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return 0; |
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} |
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#if CONFIG_MP2_MUXER |
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AVOutputFormat mp2_muxer = { |
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"mp2", |
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NULL_IF_CONFIG_SMALL("MPEG audio layer 2"), |
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"audio/x-mpeg", |
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"mp2,m2a", |
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0, |
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CODEC_ID_MP2, |
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CODEC_ID_NONE, |
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NULL, |
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mp3_write_packet, |
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mp3_write_trailer, |
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}; |
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#endif |
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#if CONFIG_MP3_MUXER |
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/**
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* Write an ID3v2.4 header at beginning of stream |
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*/ |
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static int mp3_write_header(struct AVFormatContext *s) |
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{ |
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AVMetadataTag *t = NULL; |
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int totlen = 0; |
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int64_t size_pos, cur_pos; |
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put_be32(s->pb, MKBETAG('I', 'D', '3', 0x04)); /* ID3v2.4 */ |
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put_byte(s->pb, 0); |
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put_byte(s->pb, 0); /* flags */ |
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/* reserve space for size */ |
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size_pos = url_ftell(s->pb); |
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put_be32(s->pb, 0); |
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ff_metadata_conv(&s->metadata, ff_id3v2_metadata_conv, NULL); |
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while ((t = av_metadata_get(s->metadata, "", t, AV_METADATA_IGNORE_SUFFIX))) { |
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uint32_t tag = 0; |
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if (t->key[0] == 'T' && strlen(t->key) == 4) { |
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int i; |
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for (i = 0; *ff_id3v2_tags[i]; i++) |
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if (AV_RB32(t->key) == AV_RB32(ff_id3v2_tags[i])) { |
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int len = strlen(t->value); |
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tag = AV_RB32(t->key); |
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totlen += len + ID3v2_HEADER_SIZE + 2; |
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id3v2_put_ttag(s, t->value, len + 1, tag); |
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break; |
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} |
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} |
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if (!tag) { /* unknown tag, write as TXXX frame */ |
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int len = strlen(t->key), len1 = strlen(t->value); |
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char *buf = av_malloc(len + len1 + 2); |
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if (!buf) |
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return AVERROR(ENOMEM); |
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tag = MKBETAG('T', 'X', 'X', 'X'); |
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strcpy(buf, t->key); |
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strcpy(buf + len + 1, t->value); |
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id3v2_put_ttag(s, buf, len + len1 + 2, tag); |
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totlen += len + len1 + ID3v2_HEADER_SIZE + 3; |
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av_free(buf); |
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} |
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} |
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cur_pos = url_ftell(s->pb); |
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url_fseek(s->pb, size_pos, SEEK_SET); |
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id3v2_put_size(s, totlen); |
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url_fseek(s->pb, cur_pos, SEEK_SET); |
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return 0; |
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} |
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AVOutputFormat mp3_muxer = { |
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"mp3", |
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NULL_IF_CONFIG_SMALL("MPEG audio layer 3"), |
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"audio/x-mpeg", |
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"mp3", |
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0, |
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CODEC_ID_MP3, |
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CODEC_ID_NONE, |
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mp3_write_header, |
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mp3_write_packet, |
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mp3_write_trailer, |
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AVFMT_NOTIMESTAMPS, |
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}; |
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#endif |
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