unify the wave/wave64 parser.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25106 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Yoshihisa Uchida
parent
56069476be
commit
207a84a381
1 changed files with 181 additions and 192 deletions
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@ -31,6 +31,9 @@
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#include "metadata_parsers.h"
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#include "logf.h"
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/* Wave(RIFF)/Wave64 format */
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# define AV_WL32(p, d) do { \
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((uint8_t*)(p))[0] = (d); \
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((uint8_t*)(p))[1] = (d)>>8; \
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@ -42,14 +45,36 @@
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((uint8_t*)(p))[1] = (d)>>8; \
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} while(0)
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/* Wave(RIFF)/Wave64 format */
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enum {
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RIFF_CHUNK = 0,
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WAVE_CHUNK,
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FMT_CHUNK,
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FACT_CHUNK,
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DATA_CHUNK,
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NUM_CHUNKS,
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};
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/* Wave chunk names */
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static const unsigned char *wave_chunknames[NUM_CHUNKS] =
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{
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[RIFF_CHUNK] = "RIFF",
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[WAVE_CHUNK] = "WAVE",
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[FMT_CHUNK] = "fmt ",
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[FACT_CHUNK] = "fact",
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[DATA_CHUNK] = "data",
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};
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/* Wave64 GUIDs */
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#define WAVE64_GUID_RIFF "riff\x2e\x91\xcf\x11\xa5\xd6\x28\xdb\x04\xc1\x00\x00"
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#define WAVE64_GUID_WAVE "wave\xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a"
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#define WAVE64_GUID_FMT "fmt \xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a"
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#define WAVE64_GUID_DATA "data\xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a"
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static const unsigned char *wave64_chunknames[NUM_CHUNKS] =
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{
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[RIFF_CHUNK] = "riff\x2e\x91\xcf\x11\xa5\xd6\x28\xdb\x04\xc1\x00\x00",
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[WAVE_CHUNK] = "wave\xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a",
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[FMT_CHUNK] = "fmt \xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a",
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[FACT_CHUNK] = "fact\xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a",
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[DATA_CHUNK] = "data\xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a",
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};
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/* support formats */
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enum
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{
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WAVE_FORMAT_PCM = 0x0001, /* Microsoft PCM Format */
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@ -65,21 +90,21 @@ enum
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IBM_FORMAT_ALAW = 0x0102, /* same as WAVE_FORMAT_ALAW */
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WAVE_FORMAT_ATRAC3 = 0x0270, /* Atrac3 stream */
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WAVE_FORMAT_SWF_ADPCM = 0x5346, /* Adobe SWF ADPCM */
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WAVE_FORMAT_EXTENSIBLE = 0xFFFE,
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};
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struct wave_fmt {
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unsigned int formattag;
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unsigned long channels;
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unsigned int channels;
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unsigned int blockalign;
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unsigned long bitspersample;
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unsigned int bitspersample;
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unsigned int samplesperblock;
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uint32_t totalsamples;
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uint64_t numbytes;
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};
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static unsigned long get_totalsamples(struct wave_fmt *fmt, struct mp3entry* id3)
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static void set_totalsamples(struct wave_fmt *fmt, struct mp3entry* id3)
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{
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unsigned long totalsamples = 0;
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switch (fmt->formattag)
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{
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case WAVE_FORMAT_PCM:
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@ -88,15 +113,18 @@ static unsigned long get_totalsamples(struct wave_fmt *fmt, struct mp3entry* id3
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case WAVE_FORMAT_MULAW:
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case IBM_FORMAT_ALAW:
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case IBM_FORMAT_MULAW:
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totalsamples =
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fmt->numbytes / ((fmt->bitspersample >> 3) * fmt->channels);
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if (fmt->bitspersample != 0 && fmt->channels != 0)
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fmt->totalsamples = fmt->numbytes / ((fmt->bitspersample >> 3) * fmt->channels);
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break;
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case WAVE_FORMAT_ADPCM:
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case WAVE_FORMAT_DVI_ADPCM:
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case WAVE_FORMAT_XBOX_ADPCM:
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totalsamples = (fmt->numbytes / fmt->blockalign) * fmt->samplesperblock;
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if (fmt->blockalign != 0)
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fmt->totalsamples = (fmt->numbytes / fmt->blockalign) * fmt->samplesperblock;
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break;
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case WAVE_FORMAT_YAMAHA_ADPCM:
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if (fmt->blockalign != 0 && fmt->channels != 0)
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{
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if (fmt->samplesperblock == 0)
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{
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if (fmt->blockalign == ((id3->frequency / 60) + 4) * fmt->channels)
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@ -104,23 +132,26 @@ static unsigned long get_totalsamples(struct wave_fmt *fmt, struct mp3entry* id3
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else
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fmt->samplesperblock = (fmt->blockalign << 1) / fmt->channels;
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}
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totalsamples = (fmt->numbytes / fmt->blockalign) * fmt->samplesperblock;
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fmt->totalsamples = (fmt->numbytes / fmt->blockalign) * fmt->samplesperblock;
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}
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break;
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case WAVE_FORMAT_DIALOGIC_OKI_ADPCM:
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totalsamples = fmt->numbytes << 1;
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fmt->totalsamples = fmt->numbytes << 1;
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break;
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case WAVE_FORMAT_SWF_ADPCM:
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if (fmt->blockalign != 0 && fmt->bitspersample != 0 && fmt->channels != 0)
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{
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if (fmt->samplesperblock == 0)
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fmt->samplesperblock = (((fmt->blockalign << 3) - 2) / fmt->channels - 22)
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/ fmt->bitspersample;
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totalsamples = (fmt->numbytes / fmt->blockalign) * fmt->samplesperblock;
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fmt->totalsamples = (fmt->numbytes / fmt->blockalign) * fmt->samplesperblock;
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}
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break;
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default:
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totalsamples = 0;
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fmt->totalsamples = 0;
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break;
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}
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return totalsamples;
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}
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static void parse_riff_format(unsigned char* buf, int fmtsize, struct wave_fmt *fmt,
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@ -138,67 +169,25 @@ static void parse_riff_format(unsigned char* buf, int fmtsize, struct wave_fmt *
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fmt->blockalign = buf[12] | (buf[13] << 8);
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/* wBitsPerSample */
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fmt->bitspersample = buf[14] | (buf[15] << 8);
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if (fmt->formattag != WAVE_FORMAT_EXTENSIBLE)
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{
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if (fmtsize > 19)
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{
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/* wSamplesPerBlock */
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fmt->samplesperblock = buf[18] | (buf[19] << 8);
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}
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}
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bool get_wave_metadata(int fd, struct mp3entry* id3)
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{
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/* Use the trackname part of the id3 structure as a temporary buffer */
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unsigned char* buf = (unsigned char *)id3->path;
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struct wave_fmt fmt;
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unsigned long totalsamples = 0;
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unsigned long offset = 0;
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int read_bytes;
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int i;
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memset(&fmt, 0, sizeof(struct wave_fmt));
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/* get RIFF chunk header */
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if ((lseek(fd, 0, SEEK_SET) < 0) || (read(fd, buf, 12) < 12))
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{
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return false;
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}
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offset += 12;
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if ((memcmp(buf, "RIFF", 4) != 0) || (memcmp(&buf[8], "WAVE", 4) != 0))
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else if (fmtsize > 25)
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{
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DEBUGF("metadata error: missing riff header.\n");
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return false;
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/* wValidBitsPerSample */
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fmt->bitspersample = buf[18] | (buf[19] << 8);
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/* SubFormat */
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fmt->formattag = buf[24] | (buf[25] << 8);
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}
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/* iterate over WAVE chunks until 'data' chunk */
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while (true)
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{
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/* get chunk header */
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if (read(fd, buf, 8) < 8)
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return false;
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offset += 8;
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/* chunkSize */
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i = get_long_le(&buf[4]);
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if (memcmp(buf, "fmt ", 4) == 0)
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{
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/* get rest of chunk */
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if (i < 16)
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return false;
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read_bytes = (i > 19)? 20 : 16;
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if (read(fd, buf, read_bytes) != read_bytes)
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return false;
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offset += read_bytes;
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i -= read_bytes;
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parse_riff_format(buf, read_bytes, &fmt, id3);
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/* Check for ATRAC3 stream */
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if (fmt.formattag == WAVE_FORMAT_ATRAC3)
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if (fmt->formattag == WAVE_FORMAT_ATRAC3)
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{
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int jsflag = 0;
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if(id3->bitrate == 66 || id3->bitrate == 94)
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@ -209,84 +198,38 @@ bool get_wave_metadata(int fd, struct mp3entry* id3)
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id3->codectype = AFMT_OMA_ATRAC3;
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/* Store the extradata for the codec */
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AV_WL16(&id3->id3v2buf[0], 1); // always 1
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AV_WL32(&id3->id3v2buf[2], id3->frequency); // samples rate
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AV_WL32(&id3->id3v2buf[2], id3->frequency);// samples rate
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AV_WL16(&id3->id3v2buf[6], jsflag); // coding mode
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AV_WL16(&id3->id3v2buf[8], jsflag); // coding mode
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AV_WL16(&id3->id3v2buf[10], 1); // always 1
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AV_WL16(&id3->id3v2buf[12], 0); // always 0
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}
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}
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else if (memcmp(buf, "data", 4) == 0)
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{
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fmt.numbytes = i;
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if (fmt.formattag == WAVE_FORMAT_ATRAC3)
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id3->first_frame_offset = offset;
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break;
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}
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else if (memcmp(buf, "fact", 4) == 0)
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{
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/* dwSampleLength */
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if (i >= 4)
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{
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/* get rest of chunk */
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if (read(fd, buf, 4) < 4)
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return false;
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offset += 4;
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i -= 4;
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totalsamples = get_long_le(buf);
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}
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}
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/* seek to next chunk (even chunk sizes must be padded) */
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i += (i & 0x01);
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if(lseek(fd, i, SEEK_CUR) < 0)
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return false;
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offset += i;
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}
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if ((fmt.numbytes == 0) || (fmt.channels == 0) || (fmt.blockalign == 0))
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{
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DEBUGF("metadata error: numbytes, channels, or blockalign is 0.\n");
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return false;
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}
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if (totalsamples == 0)
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{
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totalsamples = get_totalsamples(&fmt, id3);
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}
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id3->vbr = false; /* All WAV files are CBR */
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id3->filesize = filesize(fd);
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/* Calculate track length (in ms) and estimate the bitrate (in kbit/s) */
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if(id3->codectype != AFMT_OMA_ATRAC3)
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id3->length = ((int64_t) totalsamples * 1000) / id3->frequency;
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else
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id3->length = ((id3->filesize - id3->first_frame_offset) * 8) / id3->bitrate;
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return true;
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}
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bool get_wave64_metadata(int fd, struct mp3entry* id3)
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bool read_header(int fd, struct mp3entry* id3, const unsigned char **chunknames, bool is_64)
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{
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/* Use the trackname part of the id3 structure as a temporary buffer */
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/* Use the temporary buffer */
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unsigned char* buf = (unsigned char *)id3->path;
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struct wave_fmt fmt;
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unsigned long totalsamples = 0;
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int read_bytes;
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uint64_t i;
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unsigned int namelen = (is_64)? 16 : 4;
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unsigned int sizelen = (is_64)? 8 : 4;
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unsigned int len = namelen + sizelen;
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uint64_t chunksize;
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uint64_t offset = len + namelen;
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int read_data;
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memset(&fmt, 0, sizeof(struct wave_fmt));
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/* get RIFF chunk header */
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if ((lseek(fd, 0, SEEK_SET) < 0) || (read(fd, buf, 40) < 40))
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return false;
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lseek(fd, 0, SEEK_SET);
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read(fd, buf, offset);
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if ((memcmp(buf , WAVE64_GUID_RIFF, 16) != 0)||
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(memcmp(buf+24, WAVE64_GUID_WAVE, 16) != 0))
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if ((memcmp(buf, chunknames[RIFF_CHUNK], namelen) != 0) ||
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(memcmp(buf + len, chunknames[WAVE_CHUNK], namelen) != 0))
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{
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DEBUGF("metadata error: does not wave64 file\n");
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DEBUGF("metadata error: missing riff header.\n");
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return false;
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}
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@ -294,60 +237,106 @@ bool get_wave64_metadata(int fd, struct mp3entry* id3)
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while (true)
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{
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/* get chunk header */
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if (read(fd, buf, 24) < 24)
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return false;
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/* chunkSize (excludes GUID and size length) */
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i = get_uint64_le(buf + 16) - 24;
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if (memcmp(buf, WAVE64_GUID_FMT, 16) == 0)
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if (read(fd, buf, len) <= 0)
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{
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DEBUGF("find 'fmt ' chunk\n");
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if (i < 16)
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DEBUGF("metadata error: read error or missing 'data' chunk.\n");
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return false;
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read_bytes = (i > 16)? 24 : 16;
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if ((int)i < read_bytes)
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i = 0;
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else
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i -= read_bytes;
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/* get rest of chunk */
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if (read(fd, buf, read_bytes) < read_bytes)
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return false;
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parse_riff_format(buf, read_bytes, &fmt, id3);
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}
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else if (memcmp(buf, WAVE64_GUID_DATA, 16) == 0)
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offset += len;
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/* get chunk size (when the header is wave64, chunksize includes GUID and data length) */
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chunksize = (is_64) ? get_uint64_le(buf + namelen) - len :
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get_long_le(buf + namelen);
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if (memcmp(buf, chunknames[DATA_CHUNK], namelen) == 0)
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{
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DEBUGF("find 'data' chunk\n");
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fmt.numbytes = i;
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fmt.numbytes = chunksize;
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if (fmt.formattag == WAVE_FORMAT_ATRAC3)
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id3->first_frame_offset = offset;
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break;
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}
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/* seek to next chunk (8byte bound) */
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i += (1 + ~i) & 0x07;
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/* padded to next chunk */
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chunksize += ((is_64)? ((1 + ~chunksize) & 0x07) : (chunksize & 1));
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offset += chunksize;
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if(lseek(fd, i, SEEK_CUR) < 0)
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read_data = 0;
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if (memcmp(buf, chunknames[FMT_CHUNK], namelen) == 0)
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{
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DEBUGF("find 'fmt ' chunk\n");
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if (chunksize < 16)
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{
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DEBUGF("metadata error: 'fmt ' chunk is too small: %d\n", (int)chunksize);
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return false;
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}
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if ((fmt.numbytes == 0) || (fmt.channels == 0) || (fmt.blockalign == 0))
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/* get and parse format */
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read_data = (chunksize > 25)? 26 : chunksize;
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read(fd, buf, read_data);
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parse_riff_format(buf, read_data, &fmt, id3);
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}
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else if (memcmp(buf, chunknames[FACT_CHUNK], namelen) == 0)
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{
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DEBUGF("metadata error: numbytes, channels, or blockalign is 0\n");
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return false;
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DEBUGF("find 'fact' chunk\n");
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/* dwSampleLength */
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if (chunksize >= sizelen)
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{
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/* get totalsamples */
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read_data = sizelen;
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read(fd, buf, read_data);
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fmt.totalsamples = (is_64)? get_uint64_le(buf) : get_long_le(buf);
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}
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}
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if (totalsamples == 0)
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{
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totalsamples = get_totalsamples(&fmt, id3);
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lseek(fd, chunksize - read_data, SEEK_CUR);
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}
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id3->vbr = false; /* All Wave64 files are CBR */
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if (fmt.totalsamples == 0)
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set_totalsamples(&fmt, id3);
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id3->vbr = false; /* All Wave/Wave64 files are CBR */
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id3->filesize = filesize(fd);
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/* Calculate track length [ms] */
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id3->length = ((int64_t) totalsamples * 1000) / id3->frequency;
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/* Calculate track length (in ms) and estimate the bitrate (in kbit/s) */
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if(fmt.formattag != AFMT_OMA_ATRAC3)
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{
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if (id3->frequency != 0)
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id3->length = ((int64_t) fmt.totalsamples * 1000) / id3->frequency;
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}
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else
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{
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if (id3->bitrate != 0)
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id3->length = ((id3->filesize - id3->first_frame_offset) * 8) / id3->bitrate;
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}
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/* output header/id3 info (for debug) */
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DEBUGF("%s header info ----\n", (is_64)? "wave64" : "wave");
|
||||
DEBUGF(" format: %04x\n", (int)fmt.formattag);
|
||||
DEBUGF(" channels: %u\n", fmt.channels);
|
||||
DEBUGF(" blockalign: %u\n", fmt.blockalign);
|
||||
DEBUGF(" bitspersample: %u\n", fmt.bitspersample);
|
||||
DEBUGF(" samplesperblock: %u\n", fmt.samplesperblock);
|
||||
DEBUGF(" totalsamples: %u\n", (unsigned int)fmt.totalsamples);
|
||||
DEBUGF(" numbytes; %u\n", (unsigned int)fmt.numbytes);
|
||||
DEBUGF("id3 info ----\n");
|
||||
DEBUGF(" frquency: %u\n", (unsigned int)id3->frequency);
|
||||
DEBUGF(" bitrate: %d\n", id3->bitrate);
|
||||
DEBUGF(" length: %u\n", (unsigned int)id3->length);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
bool get_wave_metadata(int fd, struct mp3entry* id3)
|
||||
{
|
||||
return read_header(fd, id3, (const unsigned char **)&wave_chunknames, false);
|
||||
}
|
||||
|
||||
bool get_wave64_metadata(int fd, struct mp3entry* id3)
|
||||
{
|
||||
return read_header(fd, id3, (const unsigned char **)&wave64_chunknames, true);
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue