#include "id3v1.h"
#include "id3v2.h"
#include "rawenc.h"
+#include "libavutil/avstring.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
+#include "libavcodec/mpegaudio.h"
+#include "libavcodec/mpegaudiodata.h"
+#include "libavcodec/mpegaudiodecheader.h"
+#include "libavformat/avio_internal.h"
+#include "libavutil/dict.h"
static int id3v1_set_string(AVFormatContext *s, const char *key,
uint8_t *buf, int buf_size)
{
- AVMetadataTag *tag;
- if ((tag = av_metadata_get(s->metadata, key, NULL, 0)))
- strncpy(buf, tag->value, buf_size);
+ AVDictionaryEntry *tag;
+ if ((tag = av_dict_get(s->metadata, key, NULL, 0)))
+ av_strlcpy(buf, tag->value, buf_size);
return !!tag;
}
static int id3v1_create_tag(AVFormatContext *s, uint8_t *buf)
{
- AVMetadataTag *tag;
+ AVDictionaryEntry *tag;
int i, count = 0;
memset(buf, 0, ID3v1_TAG_SIZE); /* fail safe */
count += id3v1_set_string(s, "TALB", buf + 63, 30); //album
count += id3v1_set_string(s, "TDRL", buf + 93, 4); //date
count += id3v1_set_string(s, "comment", buf + 97, 30);
- if ((tag = av_metadata_get(s->metadata, "TRCK", NULL, 0))) { //track
+ if ((tag = av_dict_get(s->metadata, "TRCK", NULL, 0))) { //track
buf[125] = 0;
buf[126] = atoi(tag->value);
count++;
}
buf[127] = 0xFF; /* default to unknown genre */
- if ((tag = av_metadata_get(s->metadata, "TCON", NULL, 0))) { //genre
+ if ((tag = av_dict_get(s->metadata, "TCON", NULL, 0))) { //genre
for(i = 0; i <= ID3v1_GENRE_MAX; i++) {
if (!strcasecmp(tag->value, ff_id3v1_genre_str[i])) {
buf[127] = i;
return len + ID3v2_HEADER_SIZE;
}
-static int mp3_write_trailer(struct AVFormatContext *s)
+static int mp2_write_trailer(struct AVFormatContext *s)
{
uint8_t buf[ID3v1_TAG_SIZE];
CODEC_ID_NONE,
NULL,
ff_raw_write_packet,
- mp3_write_trailer,
+ mp2_write_trailer,
};
#endif
#if CONFIG_MP3_MUXER
+#define VBR_NUM_BAGS 400
+#define VBR_TOC_SIZE 100
typedef struct MP3Context {
const AVClass *class;
int id3v2_version;
+ int64_t frames_offset;
+ int32_t frames;
+ int32_t size;
+ uint32_t want;
+ uint32_t seen;
+ uint32_t pos;
+ uint64_t bag[VBR_NUM_BAGS];
} MP3Context;
static const AVOption options[] = {
.version = LIBAVUTIL_VERSION_INT,
};
-static int id3v2_check_write_tag(AVFormatContext *s, AVMetadataTag *t, const char table[][4],
+static int id3v2_check_write_tag(AVFormatContext *s, AVDictionaryEntry *t, const char table[][4],
enum ID3v2Encoding enc)
{
uint32_t tag;
return -1;
}
+static const int64_t xing_offtbl[2][2] = {{32, 17}, {17,9}};
+
+/*
+ * Write an empty XING header and initialize respective data.
+ */
+static int mp3_write_xing(AVFormatContext *s)
+{
+ AVCodecContext *codec = s->streams[0]->codec;
+ MP3Context *mp3 = s->priv_data;
+ int bitrate_idx = 3;
+ int64_t xing_offset;
+ int32_t mask, header;
+ MPADecodeHeader c;
+ int srate_idx, i, channels;
+ int needed;
+
+ for (i = 0; i < FF_ARRAY_ELEMS(ff_mpa_freq_tab); i++)
+ if (ff_mpa_freq_tab[i] == codec->sample_rate) {
+ srate_idx = i;
+ break;
+ }
+ if (i == FF_ARRAY_ELEMS(ff_mpa_freq_tab)) {
+ av_log(s, AV_LOG_ERROR, "Unsupported sample rate.\n");
+ return -1;
+ }
+
+ switch (codec->channels) {
+ case 1: channels = MPA_MONO; break;
+ case 2: channels = MPA_STEREO; break;
+ default: av_log(s, AV_LOG_ERROR, "Unsupported number of channels.\n"); return -1;
+ }
+
+ /* dummy MPEG audio header */
+ header = 0xff << 24; // sync
+ header |= (0x7 << 5 | 0x3 << 3 | 0x1 << 1 | 0x1) << 16; // sync/mpeg-1/layer 3/no crc*/
+ header |= (srate_idx << 2) << 8;
+ header |= channels << 6;
+
+ for (;;) {
+ if (15 == bitrate_idx)
+ return -1;
+
+ mask = (bitrate_idx << 4) << 8;
+ header |= mask;
+ ff_mpegaudio_decode_header(&c, header);
+ xing_offset=xing_offtbl[c.lsf == 1][c.nb_channels == 1];
+ needed = 4 // header
+ + xing_offset
+ + 4 // xing tag
+ + 4 // frames/size/toc flags
+ + 4 // frames
+ + 4 // size
+ + VBR_TOC_SIZE; // toc
+
+ if (needed <= c.frame_size)
+ break;
+
+ header &= ~mask;
+ ++bitrate_idx;
+ }
+
+ avio_wb32(s->pb, header);
+ ffio_fill(s->pb, 0, xing_offset);
+ avio_wb32(s->pb, MKBETAG('X', 'i', 'n', 'g'));
+ avio_wb32(s->pb, 0x01 | 0x02 | 0x04); // frames/size/toc
+
+ mp3->frames_offset = avio_tell(s->pb);
+ mp3->size = c.frame_size;
+ mp3->want=1;
+ mp3->seen=0;
+ mp3->pos=0;
+
+ avio_wb32(s->pb, 0); // frames
+ avio_wb32(s->pb, 0); // size
+
+ // toc
+ for (i = 0; i < VBR_TOC_SIZE; ++i)
+ avio_w8(s->pb, (uint8_t)(255 * i / VBR_TOC_SIZE));
+
+ ffio_fill(s->pb, 0, c.frame_size - needed);
+ avio_flush(s->pb);
+
+ return 0;
+}
+
+/*
+ * Add a frame to XING data.
+ * Following lame's "VbrTag.c".
+ */
+static void mp3_xing_add_frame(AVFormatContext *s, AVPacket *pkt)
+{
+ MP3Context *mp3 = s->priv_data;
+ int i;
+
+ ++mp3->frames;
+ mp3->size += pkt->size;
+
+ if (mp3->want == ++mp3->seen) {
+ mp3->bag[mp3->pos] = mp3->size;
+
+ if (VBR_NUM_BAGS == ++mp3->pos) {
+ /* shrink table to half size by throwing away each second bag. */
+ for (i = 1; i < VBR_NUM_BAGS; i += 2)
+ mp3->bag[i >> 1] = mp3->bag[i];
+
+ /* double wanted amount per bag. */
+ mp3->want <<= 1;
+ /* adjust current position to half of table size. */
+ mp3->pos >>= 1;
+ }
+
+ mp3->seen = 0;
+ }
+}
+
+static void mp3_fix_xing(AVFormatContext *s)
+{
+ MP3Context *mp3 = s->priv_data;
+ int i;
+
+ avio_flush(s->pb);
+ avio_seek(s->pb, mp3->frames_offset, SEEK_SET);
+ avio_wb32(s->pb, mp3->frames);
+ avio_wb32(s->pb, mp3->size);
+
+ avio_w8(s->pb, 0); // first toc entry has to be zero.
+
+ for (i = 1; i < VBR_TOC_SIZE; ++i) {
+ int j = i * mp3->pos / VBR_TOC_SIZE;
+ int seek_point = 256LL * mp3->bag[j] / mp3->size;
+ avio_w8(s->pb, FFMIN(seek_point, 255));
+ }
+
+ avio_flush(s->pb);
+ avio_seek(s->pb, 0, SEEK_END);
+}
+
/**
* Write an ID3v2 header at beginning of stream
*/
static int mp3_write_header(struct AVFormatContext *s)
{
MP3Context *mp3 = s->priv_data;
- AVMetadataTag *t = NULL;
+ AVDictionaryEntry *t = NULL;
int totlen = 0, enc = mp3->id3v2_version == 3 ? ID3v2_ENCODING_UTF16BOM :
ID3v2_ENCODING_UTF8;
int64_t size_pos, cur_pos;
if (mp3->id3v2_version == 4)
ff_metadata_conv(&s->metadata, ff_id3v2_4_metadata_conv, NULL);
- while ((t = av_metadata_get(s->metadata, "", t, AV_METADATA_IGNORE_SUFFIX))) {
+ while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {
int ret;
if ((ret = id3v2_check_write_tag(s, t, ff_id3v2_tags, enc)) > 0) {
id3v2_put_size(s, totlen);
avio_seek(s->pb, cur_pos, SEEK_SET);
+ if (s->pb->seekable)
+ mp3_write_xing(s);
+
+ return 0;
+}
+
+static int mp3_write_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ if (! pkt || ! pkt->data || pkt->size < 4)
+ return ff_raw_write_packet(s, pkt);
+ else {
+ MP3Context *mp3 = s->priv_data;
+#ifdef FILTER_VBR_HEADERS
+ MPADecodeHeader c;
+ int base;
+
+ ff_mpegaudio_decode_header(&c, AV_RB32(pkt->data));
+
+ /* filter out XING and INFO headers. */
+ base = 4 + xing_offtbl[c.lsf == 1][c.nb_channels == 1];
+
+ if (base + 4 <= pkt->size) {
+ uint32_t v = AV_RB32(pkt->data + base);
+
+ if (MKBETAG('X','i','n','g') == v || MKBETAG('I','n','f','o') == v)
+ return 0;
+ }
+
+ /* filter out VBRI headers. */
+ base = 4 + 32;
+
+ if (base + 4 <= pkt->size && MKBETAG('V','B','R','I') == AV_RB32(pkt->data + base))
+ return 0;
+#endif
+
+ if (mp3->frames_offset)
+ mp3_xing_add_frame(s, pkt);
+
+ return ff_raw_write_packet(s, pkt);
+ }
+}
+
+static int mp3_write_trailer(AVFormatContext *s)
+{
+ MP3Context *mp3 = s->priv_data;
+ int ret=mp2_write_trailer(s);
+
+ if (ret < 0)
+ return ret;
+
+ if (mp3->frames_offset)
+ mp3_fix_xing(s);
+
return 0;
}
CODEC_ID_MP3,
CODEC_ID_NONE,
mp3_write_header,
- ff_raw_write_packet,
+ mp3_write_packet,
mp3_write_trailer,
AVFMT_NOTIMESTAMPS,
.priv_class = &mp3_muxer_class,
projects / ffmpeg / blobdiff