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vlc-2-2
Commit 88bcfa08 authored by Rafaël Carré's avatar Rafaël Carré
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flac packetizer: move functions 

remove prototypes
parent 058b1732
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Showing with 297 additions and 308 deletions
modules/packetizer/flac.c
View file @ 88bcfa08
......@@ -111,57 +111,6 @@ static const int pi_channels_maps[9] =
};
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static block_t *Packetize(decoder_t *, block_t **);
static int SyncInfo(decoder_t *, uint8_t *, unsigned int *,
unsigned int *, unsigned int *);
static uint64_t read_utf8(const uint8_t *p_buf, int *pi_read);
static uint8_t flac_crc8(const uint8_t *data, unsigned len);
static int Open(vlc_object_t *p_this)
{
decoder_t *p_dec = (decoder_t*)p_this;
decoder_sys_t *p_sys;
if (p_dec->fmt_in.i_codec != VLC_CODEC_FLAC)
return VLC_EGENERIC;
/* */
p_dec->p_sys = p_sys = malloc(sizeof(*p_sys));
if (!p_sys)
return VLC_ENOMEM;
date_Set(&p_sys->end_date, 0);
p_sys->i_state = STATE_NOSYNC;
p_sys->b_stream_info = false;
p_sys->i_pts = VLC_TS_INVALID;
block_BytestreamInit(&p_sys->bytestream);
/* */
es_format_Copy(&p_dec->fmt_out, &p_dec->fmt_in);
p_dec->fmt_out.i_cat = AUDIO_ES;
p_dec->fmt_out.i_codec = VLC_CODEC_FLAC;
/* */
p_dec->pf_decode_audio = NULL;
p_dec->pf_packetize = Packetize;
return VLC_SUCCESS;
}
static void Close(vlc_object_t *p_this)
{
decoder_t *p_dec = (decoder_t *)p_this;
decoder_sys_t *p_sys = p_dec->p_sys;
block_BytestreamRelease(&p_sys->bytestream);
free(p_sys);
}
/*****************************************************************************
* ProcessHeader: process Flac header.
*****************************************************************************/
......@@ -200,209 +149,134 @@ static void ProcessHeader(decoder_t *p_dec)
memcpy(p_dec->fmt_out.p_extra, p_extra, i_extra);
}
/* */
static block_t *Packetize(decoder_t *p_dec, block_t **pp_block)
/* Will return 0xffffffffffffffff for an invalid utf-8 sequence */
static uint64_t read_utf8(const uint8_t *p_buf, int *pi_read)
{
decoder_sys_t *p_sys = p_dec->p_sys;
uint8_t p_header[MAX_FLAC_HEADER_SIZE];
block_t *p_sout_block;
uint64_t i_result = 0;
unsigned i;
if (!pp_block || !*pp_block)
return NULL;
if (!(p_buf[0] & 0x80)) { /* 0xxxxxxx */
i_result = p_buf[0];
i = 0;
} else if (p_buf[0] & 0xC0 && !(p_buf[0] & 0x20)) { /* 110xxxxx */
i_result = p_buf[0] & 0x1F;
i = 1;
} else if (p_buf[0] & 0xE0 && !(p_buf[0] & 0x10)) { /* 1110xxxx */
i_result = p_buf[0] & 0x0F;
i = 2;
} else if (p_buf[0] & 0xF0 && !(p_buf[0] & 0x08)) { /* 11110xxx */
i_result = p_buf[0] & 0x07;
i = 3;
} else if (p_buf[0] & 0xF8 && !(p_buf[0] & 0x04)) { /* 111110xx */
i_result = p_buf[0] & 0x03;
i = 4;
} else if (p_buf[0] & 0xFC && !(p_buf[0] & 0x02)) { /* 1111110x */
i_result = p_buf[0] & 0x01;
i = 5;
} else if (p_buf[0] & 0xFE && !(p_buf[0] & 0x01)) { /* 11111110 */
i_result = 0;
i = 6;
} else {
return INT64_C(0xffffffffffffffff);
}
if ((*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED)) {
if ((*pp_block)->i_flags&BLOCK_FLAG_CORRUPTED) {
p_sys->i_state = STATE_NOSYNC;
block_BytestreamEmpty(&p_sys->bytestream);
for (unsigned j = 1; j <= i; j++) {
if (!(p_buf[j] & 0x80) || (p_buf[j] & 0x40)) { /* 10xxxxxx */
return INT64_C(0xffffffffffffffff);
}
date_Set(&p_sys->end_date, 0);
block_Release(*pp_block);
return NULL;
i_result <<= 6;
i_result |= (p_buf[j] & 0x3F);
}
if (!p_sys->b_stream_info)
ProcessHeader(p_dec);
*pi_read = i;
return i_result;
}
if (p_sys->stream_info.channels > 8) {
msg_Err(p_dec, "This stream uses too many audio channels");
return NULL;
}
/* CRC-8, poly = x^8 + x^2 + x^1 + x^0, init = 0 */
static const uint8_t flac_crc8_table[256] = {
0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15,
0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D,
0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65,
0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D,
0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5,
0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD,
0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85,
0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3, 0xBA, 0xBD,
0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2,
0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA,
0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2,
0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A,
0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32,
0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A,
0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42,
0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A,
0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C,
0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4,
0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC,
0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4,
0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C,
0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44,
0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B, 0x0C,
0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34,
0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B,
0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63,
0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B,
0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13,
0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB,
0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83,
0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB,
0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3
};
if (!date_Get(&p_sys->end_date) && (*pp_block)->i_pts <= VLC_TS_INVALID) {
/* We've just started the stream, wait for the first PTS. */
block_Release(*pp_block);
return NULL;
} else if (!date_Get(&p_sys->end_date)) {
/* The first PTS is as good as anything else. */
p_sys->i_rate = p_dec->fmt_out.audio.i_rate;
date_Init(&p_sys->end_date, p_sys->i_rate, 1);
date_Set(&p_sys->end_date, (*pp_block)->i_pts);
}
static uint8_t flac_crc8(const uint8_t *data, unsigned len)
{
uint8_t crc = 0;
block_BytestreamPush(&p_sys->bytestream, *pp_block);
while (len--)
crc = flac_crc8_table[crc ^ *data++];
while (1) {
switch (p_sys->i_state) {
case STATE_NOSYNC:
while (block_PeekBytes(&p_sys->bytestream, p_header, 2)
== VLC_SUCCESS) {
if (p_header[0] == 0xFF && (p_header[1] & 0xFE) == 0xF8) {
p_sys->i_state = STATE_SYNC;
break;
}
block_SkipByte(&p_sys->bytestream);
}
if (p_sys->i_state != STATE_SYNC) {
block_BytestreamFlush(&p_sys->bytestream);
return NULL; /* Need more data */
}
return crc;
}
case STATE_SYNC:
/* New frame, set the Presentation Time Stamp */
p_sys->i_pts = p_sys->bytestream.p_block->i_pts;
if (p_sys->i_pts > VLC_TS_INVALID &&
p_sys->i_pts != date_Get(&p_sys->end_date))
date_Set(&p_sys->end_date, p_sys->i_pts);
p_sys->i_state = STATE_HEADER;
/*****************************************************************************
* SyncInfo: parse FLAC sync info
*****************************************************************************/
static int SyncInfo(decoder_t *p_dec, uint8_t *p_buf,
unsigned int * pi_channels,
unsigned int * pi_sample_rate,
unsigned int * pi_bits_per_sample)
{
decoder_sys_t *p_sys = p_dec->p_sys;
int i_header, i_temp, i_read;
unsigned i_blocksize = 0;
int i_blocksize_hint = 0, i_sample_rate_hint = 0;
case STATE_HEADER:
/* Get FLAC frame header (MAX_FLAC_HEADER_SIZE bytes) */
if (block_PeekBytes(&p_sys->bytestream, p_header,
MAX_FLAC_HEADER_SIZE) != VLC_SUCCESS)
return NULL; /* Need more data */
/* Check syncword */
if (p_buf[0] != 0xFF || (p_buf[1] & 0xFE) != 0xF8)
return 0;
/* Check if frame is valid and get frame info */
p_sys->i_frame_length = SyncInfo(p_dec, p_header,
&p_sys->i_channels,
&p_sys->i_rate,
&p_sys->i_bits_per_sample);
if (!p_sys->i_frame_length) {
msg_Dbg(p_dec, "emulated sync word");
block_SkipByte(&p_sys->bytestream);
p_sys->i_state = STATE_NOSYNC;
break;
}
if (p_sys->i_rate != p_dec->fmt_out.audio.i_rate) {
p_dec->fmt_out.audio.i_rate = p_sys->i_rate;
const mtime_t i_end_date = date_Get(&p_sys->end_date);
date_Init(&p_sys->end_date, p_sys->i_rate, 1);
date_Set(&p_sys->end_date, i_end_date);
}
p_sys->i_state = STATE_NEXT_SYNC;
p_sys->i_frame_size = p_sys->b_stream_info && p_sys->stream_info.min_framesize > 0 ?
p_sys->stream_info.min_framesize : 1;
/* Check there is no emulated sync code in the rest of the header */
if (p_buf[2] == 0xff || p_buf[3] == 0xFF)
return 0;
case STATE_NEXT_SYNC:
/* TODO: If pp_block == NULL, flush the buffer without checking the
* next sync word */
/* Find blocksize (framelength) */
switch (i_temp = p_buf[2] >> 4) {
case 0:
if (p_sys->b_stream_info &&
p_sys->stream_info.min_blocksize == p_sys->stream_info.max_blocksize)
i_blocksize = p_sys->stream_info.min_blocksize;
else return 0; /* We can't do anything with this */
break;
/* Check if next expected frame contains the sync word */
while (block_PeekOffsetBytes(&p_sys->bytestream,
p_sys->i_frame_size, p_header,
MAX_FLAC_HEADER_SIZE)
== VLC_SUCCESS) {
if (p_header[0] == 0xFF && (p_header[1] & 0xFE) == 0xF8) {
/* Check if frame is valid and get frame info */
int i_frame_length =
SyncInfo(p_dec, p_header,
&p_sys->i_channels,
&p_sys->i_rate,
&p_sys->i_bits_per_sample);
case 1:
i_blocksize = 192;
break;
if (i_frame_length) {
p_sys->i_state = STATE_SEND_DATA;
break;
}
}
p_sys->i_frame_size++;
}
if (p_sys->i_state != STATE_SEND_DATA) {
if (p_sys->b_stream_info && p_sys->stream_info.max_framesize > 0 &&
p_sys->i_frame_size > p_sys->stream_info.max_framesize) {
block_SkipByte(&p_sys->bytestream);
p_sys->i_state = STATE_NOSYNC;
return NULL;
}
/* Need more data */
return NULL;
}
case STATE_SEND_DATA:
p_sout_block = block_Alloc(p_sys->i_frame_size);
/* Copy the whole frame into the buffer. When we reach this point
* we already know we have enough data available. */
block_GetBytes(&p_sys->bytestream, p_sout_block->p_buffer,
p_sys->i_frame_size);
/* Make sure we don't reuse the same pts twice */
if (p_sys->i_pts == p_sys->bytestream.p_block->i_pts)
p_sys->i_pts = p_sys->bytestream.p_block->i_pts = VLC_TS_INVALID;
p_dec->fmt_out.audio.i_channels = p_sys->i_channels;
p_dec->fmt_out.audio.i_physical_channels =
p_dec->fmt_out.audio.i_original_channels =
pi_channels_maps[p_sys->stream_info.channels];
/* So p_block doesn't get re-added several times */
*pp_block = block_BytestreamPop(&p_sys->bytestream);
p_sys->i_state = STATE_NOSYNC;
/* Date management */
p_sout_block->i_pts =
p_sout_block->i_dts = date_Get(&p_sys->end_date);
date_Increment(&p_sys->end_date, p_sys->i_frame_length);
p_sout_block->i_length =
date_Get(&p_sys->end_date) - p_sout_block->i_pts;
return p_sout_block;
}
}
return NULL;
}
/*****************************************************************************
* SyncInfo: parse FLAC sync info
*****************************************************************************/
static int SyncInfo(decoder_t *p_dec, uint8_t *p_buf,
unsigned int * pi_channels,
unsigned int * pi_sample_rate,
unsigned int * pi_bits_per_sample)
{
decoder_sys_t *p_sys = p_dec->p_sys;
int i_header, i_temp, i_read;
unsigned i_blocksize = 0;
int i_blocksize_hint = 0, i_sample_rate_hint = 0;
/* Check syncword */
if (p_buf[0] != 0xFF || (p_buf[1] & 0xFE) != 0xF8)
return 0;
/* Check there is no emulated sync code in the rest of the header */
if (p_buf[2] == 0xff || p_buf[3] == 0xFF)
return 0;
/* Find blocksize (framelength) */
switch (i_temp = p_buf[2] >> 4) {
case 0:
if (p_sys->b_stream_info &&
p_sys->stream_info.min_blocksize == p_sys->stream_info.max_blocksize)
i_blocksize = p_sys->stream_info.min_blocksize;
else return 0; /* We can't do anything with this */
break;
case 1:
i_blocksize = 192;
break;
case 2:
case 3:
case 4:
case 5:
i_blocksize = 576 << (i_temp - 2);
case 2:
case 3:
case 4:
case 5:
i_blocksize = 576 << (i_temp - 2);
break;
case 6:
......@@ -583,91 +457,206 @@ static int SyncInfo(decoder_t *p_dec, uint8_t *p_buf,
return i_blocksize;
}
/* Will return 0xffffffffffffffff for an invalid utf-8 sequence */
static uint64_t read_utf8(const uint8_t *p_buf, int *pi_read)
/* */
static block_t *Packetize(decoder_t *p_dec, block_t **pp_block)
{
uint64_t i_result = 0;
unsigned i;
decoder_sys_t *p_sys = p_dec->p_sys;
uint8_t p_header[MAX_FLAC_HEADER_SIZE];
block_t *p_sout_block;
if (!(p_buf[0] & 0x80)) { /* 0xxxxxxx */
i_result = p_buf[0];
i = 0;
} else if (p_buf[0] & 0xC0 && !(p_buf[0] & 0x20)) { /* 110xxxxx */
i_result = p_buf[0] & 0x1F;
i = 1;
} else if (p_buf[0] & 0xE0 && !(p_buf[0] & 0x10)) { /* 1110xxxx */
i_result = p_buf[0] & 0x0F;
i = 2;
} else if (p_buf[0] & 0xF0 && !(p_buf[0] & 0x08)) { /* 11110xxx */
i_result = p_buf[0] & 0x07;
i = 3;
} else if (p_buf[0] & 0xF8 && !(p_buf[0] & 0x04)) { /* 111110xx */
i_result = p_buf[0] & 0x03;
i = 4;
} else if (p_buf[0] & 0xFC && !(p_buf[0] & 0x02)) { /* 1111110x */
i_result = p_buf[0] & 0x01;
i = 5;
} else if (p_buf[0] & 0xFE && !(p_buf[0] & 0x01)) { /* 11111110 */
i_result = 0;
i = 6;
} else {
return INT64_C(0xffffffffffffffff);
if (!pp_block || !*pp_block)
return NULL;
if ((*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED)) {
if ((*pp_block)->i_flags&BLOCK_FLAG_CORRUPTED) {
p_sys->i_state = STATE_NOSYNC;
block_BytestreamEmpty(&p_sys->bytestream);
}
date_Set(&p_sys->end_date, 0);
block_Release(*pp_block);
return NULL;
}
for (unsigned j = 1; j <= i; j++) {
if (!(p_buf[j] & 0x80) || (p_buf[j] & 0x40)) { /* 10xxxxxx */
return INT64_C(0xffffffffffffffff);
if (!p_sys->b_stream_info)
ProcessHeader(p_dec);
if (p_sys->stream_info.channels > 8) {
msg_Err(p_dec, "This stream uses too many audio channels");
return NULL;
}
i_result <<= 6;
i_result |= (p_buf[j] & 0x3F);
if (!date_Get(&p_sys->end_date) && (*pp_block)->i_pts <= VLC_TS_INVALID) {
/* We've just started the stream, wait for the first PTS. */
block_Release(*pp_block);
return NULL;
} else if (!date_Get(&p_sys->end_date)) {
/* The first PTS is as good as anything else. */
p_sys->i_rate = p_dec->fmt_out.audio.i_rate;
date_Init(&p_sys->end_date, p_sys->i_rate, 1);
date_Set(&p_sys->end_date, (*pp_block)->i_pts);
}
*pi_read = i;
return i_result;
}
block_BytestreamPush(&p_sys->bytestream, *pp_block);
/* CRC-8, poly = x^8 + x^2 + x^1 + x^0, init = 0 */
static const uint8_t flac_crc8_table[256] = {
0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15,
0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D,
0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65,
0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D,
0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5,
0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD,
0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85,
0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3, 0xBA, 0xBD,
0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2,
0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA,
0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2,
0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A,
0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32,
0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A,
0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42,
0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A,
0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C,
0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4,
0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC,
0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4,
0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C,
0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44,
0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B, 0x0C,
0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34,
0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B,
0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63,
0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B,
0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13,
0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB,
0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83,
0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB,
0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3
};
while (1) {
switch (p_sys->i_state) {
case STATE_NOSYNC:
while (block_PeekBytes(&p_sys->bytestream, p_header, 2)
== VLC_SUCCESS) {
if (p_header[0] == 0xFF && (p_header[1] & 0xFE) == 0xF8) {
p_sys->i_state = STATE_SYNC;
break;
}
block_SkipByte(&p_sys->bytestream);
}
if (p_sys->i_state != STATE_SYNC) {
block_BytestreamFlush(&p_sys->bytestream);
return NULL; /* Need more data */
}
static uint8_t flac_crc8(const uint8_t *data, unsigned len)
case STATE_SYNC:
/* New frame, set the Presentation Time Stamp */
p_sys->i_pts = p_sys->bytestream.p_block->i_pts;
if (p_sys->i_pts > VLC_TS_INVALID &&
p_sys->i_pts != date_Get(&p_sys->end_date))
date_Set(&p_sys->end_date, p_sys->i_pts);
p_sys->i_state = STATE_HEADER;
case STATE_HEADER:
/* Get FLAC frame header (MAX_FLAC_HEADER_SIZE bytes) */
if (block_PeekBytes(&p_sys->bytestream, p_header,
MAX_FLAC_HEADER_SIZE) != VLC_SUCCESS)
return NULL; /* Need more data */
/* Check if frame is valid and get frame info */
p_sys->i_frame_length = SyncInfo(p_dec, p_header,
&p_sys->i_channels,
&p_sys->i_rate,
&p_sys->i_bits_per_sample);
if (!p_sys->i_frame_length) {
msg_Dbg(p_dec, "emulated sync word");
block_SkipByte(&p_sys->bytestream);
p_sys->i_state = STATE_NOSYNC;
break;
}
if (p_sys->i_rate != p_dec->fmt_out.audio.i_rate) {
p_dec->fmt_out.audio.i_rate = p_sys->i_rate;
const mtime_t i_end_date = date_Get(&p_sys->end_date);
date_Init(&p_sys->end_date, p_sys->i_rate, 1);
date_Set(&p_sys->end_date, i_end_date);
}
p_sys->i_state = STATE_NEXT_SYNC;
p_sys->i_frame_size = p_sys->b_stream_info && p_sys->stream_info.min_framesize > 0 ?
p_sys->stream_info.min_framesize : 1;
case STATE_NEXT_SYNC:
/* TODO: If pp_block == NULL, flush the buffer without checking the
* next sync word */
/* Check if next expected frame contains the sync word */
while (block_PeekOffsetBytes(&p_sys->bytestream,
p_sys->i_frame_size, p_header,
MAX_FLAC_HEADER_SIZE)
== VLC_SUCCESS) {
if (p_header[0] == 0xFF && (p_header[1] & 0xFE) == 0xF8) {
/* Check if frame is valid and get frame info */
int i_frame_length =
SyncInfo(p_dec, p_header,
&p_sys->i_channels,
&p_sys->i_rate,
&p_sys->i_bits_per_sample);
if (i_frame_length) {
p_sys->i_state = STATE_SEND_DATA;
break;
}
}
p_sys->i_frame_size++;
}
if (p_sys->i_state != STATE_SEND_DATA) {
if (p_sys->b_stream_info && p_sys->stream_info.max_framesize > 0 &&
p_sys->i_frame_size > p_sys->stream_info.max_framesize) {
block_SkipByte(&p_sys->bytestream);
p_sys->i_state = STATE_NOSYNC;
return NULL;
}
/* Need more data */
return NULL;
}
case STATE_SEND_DATA:
p_sout_block = block_Alloc(p_sys->i_frame_size);
/* Copy the whole frame into the buffer. When we reach this point
* we already know we have enough data available. */
block_GetBytes(&p_sys->bytestream, p_sout_block->p_buffer,
p_sys->i_frame_size);
/* Make sure we don't reuse the same pts twice */
if (p_sys->i_pts == p_sys->bytestream.p_block->i_pts)
p_sys->i_pts = p_sys->bytestream.p_block->i_pts = VLC_TS_INVALID;
p_dec->fmt_out.audio.i_channels = p_sys->i_channels;
p_dec->fmt_out.audio.i_physical_channels =
p_dec->fmt_out.audio.i_original_channels =
pi_channels_maps[p_sys->stream_info.channels];
/* So p_block doesn't get re-added several times */
*pp_block = block_BytestreamPop(&p_sys->bytestream);
p_sys->i_state = STATE_NOSYNC;
/* Date management */
p_sout_block->i_pts =
p_sout_block->i_dts = date_Get(&p_sys->end_date);
date_Increment(&p_sys->end_date, p_sys->i_frame_length);
p_sout_block->i_length =
date_Get(&p_sys->end_date) - p_sout_block->i_pts;
return p_sout_block;
}
}
return NULL;
}
static int Open(vlc_object_t *p_this)
{
uint8_t crc = 0;
decoder_t *p_dec = (decoder_t*)p_this;
decoder_sys_t *p_sys;
while (len--)
crc = flac_crc8_table[crc ^ *data++];
if (p_dec->fmt_in.i_codec != VLC_CODEC_FLAC)
return VLC_EGENERIC;
return crc;
/* */
p_dec->p_sys = p_sys = malloc(sizeof(*p_sys));
if (!p_sys)
return VLC_ENOMEM;
date_Set(&p_sys->end_date, 0);
p_sys->i_state = STATE_NOSYNC;
p_sys->b_stream_info = false;
p_sys->i_pts = VLC_TS_INVALID;
block_BytestreamInit(&p_sys->bytestream);
/* */
es_format_Copy(&p_dec->fmt_out, &p_dec->fmt_in);
p_dec->fmt_out.i_cat = AUDIO_ES;
p_dec->fmt_out.i_codec = VLC_CODEC_FLAC;
/* */
p_dec->pf_decode_audio = NULL;
p_dec->pf_packetize = Packetize;
return VLC_SUCCESS;
}
static void Close(vlc_object_t *p_this)
{
decoder_t *p_dec = (decoder_t *)p_this;
decoder_sys_t *p_sys = p_dec->p_sys;
block_BytestreamRelease(&p_sys->bytestream);
free(p_sys);
}
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