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];
100 if(vlc_initialized)
return 0;
102 scfi_vlc.
table = scfi_table;
110 dscf_vlc.
table = dscf_table;
118 hdr_vlc.
table = hdr_table;
127 for(j = 0; j < 2; j++){
129 quant_vlc[i][j].
table_allocated = quant_offsets[i*2 + j + 1] - quant_offsets[i*2 + j];
157 for(i = 0; i < SAMPLES_PER_BAND/3; i++){
158 t =
get_vlc2(gb, quant_vlc[0][i1].table, 9, 2);
166 for(i = 0; i < SAMPLES_PER_BAND/2; i++){
167 t =
get_vlc2(gb, quant_vlc[1][i1].table, 9, 2);
172 case 3:
case 4:
case 5:
case 6:
case 7:
177 case 8:
case 9:
case 10:
case 11:
case 12:
178 case 13:
case 14:
case 15:
case 16:
case 17:
179 t = (1 << (idx - 2)) - 1;
193 return av_clip_uintp2(ref + t, 7);
197 int *got_frame_ptr,
AVPacket *avpkt)
207 int off, ret, last_frame, skip;
208 int bits_used, bits_avail;
210 memset(bands, 0,
sizeof(*bands) * (c->
maxbands + 1));
212 buf_size = avpkt->
size & ~3;
218 if (buf_size != avpkt->
size) {
220 "extra bytes at the end will be skipped.\n");
245 for(ch = 0; ch < 2; ch++){
249 else bands[i].
res[ch] = av_clip(bands[i-1].res[ch] + t, 0, 17);
252 if(bands[i].res[0] || bands[i].res[1]){
258 for(i = 0; i <= mb; i++)
259 for(ch = 0; ch < 2; ch++)
262 for(i = 0; i <= mb; i++){
263 for(ch = 0; ch < 2; ch++){
264 if(bands[i].res[ch]){
267 switch(bands[i].scfi[ch]){
289 memset(c->
Q, 0,
sizeof(c->
Q));
292 for(ch = 0; ch < 2; ch++)
298 bits_avail = buf_size * 8;
299 if (!last_frame && ((bits_avail < bits_used) || (bits_used + 32 <= bits_avail))) {
300 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)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
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.
#define AV_LOG_WARNING
Something somehow does not look correct.
static void skip_bits_long(GetBitContext *s, int n)
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)
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
enum AVSampleFormat sample_fmt
audio sample format
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
static int get_bits_count(const GetBitContext *s)
bitstream reader API header.
static const int8_t mpc7_idx50[]
static const int8_t mpc7_idx31[]
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static const uint8_t mpc7_hdr[MPC7_HDR_SIZE *2]
#define MPC7_QUANT_VLC_TABLES
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
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.
static av_cold int mpc7_decode_init(AVCodecContext *avctx)
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
common internal API header
audio channel layout utility functions
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
#define AVERROR_PATCHWELCOME
Not yet implemented in Libav, patches welcome.
Libavcodec external API header.
Musepack decoder MPEG Audio Layer 1/2 -like codec with frames of 1152 samples divided into 32 subband...
AVSampleFormat
Audio Sample Formats.
static const int8_t mpc7_idx51[]
av_cold void ff_mpc_init(void)
main external API structure.
static void close(AVCodecParserContext *s)
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
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)
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.
static const uint16_t quant_offsets[MPC7_QUANT_VLC_TABLES *2+1]
static av_cold int init(AVCodecParserContext *s)
static const int8_t mpc7_idx30[]
int channels
number of audio channels
VLC_TYPE(* table)[2]
code, bits
#define LOCAL_ALIGNED_16(t, v,...)
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.
av_cold void ff_mpadsp_init(MPADSPContext *s)
int nb_samples
number of audio samples (per channel) described by this frame
static VLC quant_vlc[MPC7_QUANT_VLC_TABLES][2]