40 #define SAMPLES_PER_BAND 36
41 #define MPC_FRAME_SIZE (BANDS * SAMPLES_PER_BAND)
47 0, 512, 1024, 1536, 2052, 2564, 3076, 3588, 4100, 4612, 5124,
48 5636, 6164, 6676, 7224
58 static int vlc_initialized = 0;
63 static VLC_TYPE quant_tables[7224][2];
101 if(vlc_initialized)
return 0;
103 scfi_vlc.
table = scfi_table;
111 dscf_vlc.
table = dscf_table;
119 hdr_vlc.
table = hdr_table;
128 for(j = 0; j < 2; j++){
130 quant_vlc[i][j].
table_allocated = quant_offsets[i*2 + j + 1] - quant_offsets[i*2 + j];
161 for(i = 0; i < SAMPLES_PER_BAND/3; i++){
162 t =
get_vlc2(gb, quant_vlc[0][i1].table, 9, 2);
170 for(i = 0; i < SAMPLES_PER_BAND/2; i++){
171 t =
get_vlc2(gb, quant_vlc[1][i1].table, 9, 2);
176 case 3:
case 4:
case 5:
case 6:
case 7:
181 case 8:
case 9:
case 10:
case 11:
case 12:
182 case 13:
case 14:
case 15:
case 16:
case 17:
183 t = (1 << (idx - 2)) - 1;
197 return av_clip_uintp2(ref + t, 7);
201 int *got_frame_ptr,
AVPacket *avpkt)
210 int off, ret, last_frame, skip;
211 int bits_used, bits_avail;
213 memset(bands, 0,
sizeof(*bands) * (c->
maxbands + 1));
215 buf_size = avpkt->
size & ~3;
221 if (buf_size != avpkt->
size) {
223 "extra bytes at the end will be skipped.\n");
241 c->
dsp.
bswap_buf((uint32_t *)c->
bits, (
const uint32_t *)buf, buf_size >> 2);
247 for(ch = 0; ch < 2; ch++){
251 else bands[i].
res[ch] = av_clip(bands[i-1].res[ch] + t, 0, 17);
254 if(bands[i].res[0] || bands[i].res[1]){
260 for(i = 0; i <= mb; i++)
261 for(ch = 0; ch < 2; ch++)
264 for(i = 0; i <= mb; i++){
265 for(ch = 0; ch < 2; ch++){
266 if(bands[i].res[ch]){
269 switch(bands[i].scfi[ch]){
291 memset(c->
Q, 0,
sizeof(c->
Q));
294 for(ch = 0; ch < 2; ch++)
300 bits_avail = buf_size * 8;
301 if (!last_frame && ((bits_avail < bits_used) || (bits_used + 32 <= bits_avail))) {
302 av_log(avctx,
AV_LOG_ERROR,
"Error decoding frame: used %i of %i bits\n", bits_used, bits_avail);
void ff_mpc_dequantize_and_synth(MPCContext *c, int maxband, int16_t **out, int channels)
av_cold void ff_dsputil_init(DSPContext *c, AVCodecContext *avctx)
This structure describes decoded (raw) audio or video data.
static const int8_t mpc7_idx32[]
static const uint16_t mpc7_quant_vlc[MPC7_QUANT_VLC_TABLES][2][64 *2]
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
static void skip_bits_long(GetBitContext *s, int n)
AVFrame * coded_frame
the picture in the bitstream
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer with padding, reusing the given one if large enough.
#define AV_CH_LAYOUT_STEREO
static const uint8_t mpc7_quant_vlc_sizes[MPC7_QUANT_VLC_TABLES *2]
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
static int mpc7_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
enum AVSampleFormat sample_fmt
audio sample format
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
static int get_bits_count(const GetBitContext *s)
bitstream reader API header.
#define LOCAL_ALIGNED_16(t, v,...)
static const int8_t mpc7_idx50[]
static int init(AVCodecParserContext *s)
static const int8_t mpc7_idx31[]
void av_log_ask_for_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message asking for a sample.
static const uint8_t mpc7_hdr[MPC7_HDR_SIZE *2]
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
#define MPC7_QUANT_VLC_TABLES
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
static const uint8_t mpc7_quant_vlc_off[MPC7_QUANT_VLC_TABLES]
void av_log(void *avcl, int level, const char *fmt,...)
const char * name
Name of the codec implementation.
static const uint8_t mpc7_scfi[MPC7_SCFI_SIZE *2]
uint64_t channel_layout
Audio channel layout.
void ff_mpadsp_init(MPADSPContext *s)
static av_cold int mpc7_decode_init(AVCodecContext *avctx)
audio channel layout utility functions
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame)
Get a buffer for a frame.
static void mpc7_decode_flush(AVCodecContext *avctx)
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
#define INIT_VLC_USE_NEW_STATIC
Musepack decoder MPEG Audio Layer 1/2 -like codec with frames of 1152 samples divided into 32 subband...
static const int8_t mpc7_idx51[]
main external API structure.
static void close(AVCodecParserContext *s)
static void idx_to_quant(MPCContext *c, GetBitContext *gb, int idx, int *dst)
Fill samples for given subband.
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
static unsigned int av_lfg_get(AVLFG *c)
Get the next random unsigned 32-bit number using an ALFG.
static unsigned int get_bits1(GetBitContext *s)
void avcodec_get_frame_defaults(AVFrame *frame)
Set the fields of the given AVFrame to default values.
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
av_cold void av_lfg_init(AVLFG *c, unsigned int seed)
static av_cold int mpc7_decode_close(AVCodecContext *avctx)
common internal api header.
static av_cold void flush(AVCodecContext *avctx)
Flush (reset) the frame ID after seeking.
#define AVERROR_INVALIDDATA
AVSampleFormat
Audio Sample Formats.
static const uint16_t quant_offsets[MPC7_QUANT_VLC_TABLES *2+1]
#define AVERROR_PATCHWELCOME
static const int8_t mpc7_idx30[]
int channels
number of audio channels
VLC_TYPE(* table)[2]
code, bits
struct MPCContext MPCContext
uint8_t ** extended_data
pointers to the data planes/channels.
static const uint8_t mpc7_dscf[MPC7_DSCF_SIZE *2]
static int get_scale_idx(GetBitContext *gb, int ref)
Subband structure - hold all variables for each subband.
This structure stores compressed data.
int nb_samples
number of audio samples (per channel) described by this frame
static VLC quant_vlc[MPC7_QUANT_VLC_TABLES][2]