Changeset 104 for libmpcdec/branches/zorg/src/streaminfo.c
- Timestamp:
- 11/08/06 00:20:07 (18 years ago)
- File:
-
- 1 edited
-
libmpcdec/branches/zorg/src/streaminfo.c (modified) (4 diffs)
Legend:
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libmpcdec/branches/zorg/src/streaminfo.c
r81 r104 35 35 /// Implementation of streaminfo reading functions. 36 36 37 #include <mpcdec/mpcdec.h> 37 38 #include <mpcdec/streaminfo.h> 38 39 #include <stdio.h> 39 40 #include "internal.h" 41 42 mpc_uint32_t mpc_bits_read(mpc_bits_reader * r, const unsigned int nb_bits); 43 unsigned int mpc_bits_get_size(mpc_bits_reader * r, mpc_uint64_t * p_size); 40 44 41 45 static const char na[] = "n.a."; … … 53 57 } 54 58 59 static void 60 mpc_get_encoder_string(mpc_streaminfo* si) 61 { 62 if (si->encoder_version == 0) { 63 sprintf(si->encoder, "Buschmann 1.7.0...9, Klemm 0.90...1.05"); 64 } else { 65 switch (si->encoder_version % 10) { 66 case 0: 67 sprintf(si->encoder, "Release %u.%u", si->encoder_version / 100, 68 si->encoder_version / 10 % 10); 69 break; 70 case 2: case 4: case 6: case 8: 71 sprintf(si->encoder, "Beta %u.%02u", si->encoder_version / 100, 72 si->encoder_version % 100); 73 break; 74 default: 75 sprintf(si->encoder, "--Alpha-- %u.%02u", 76 si->encoder_version / 100, si->encoder_version % 100); 77 break; 78 } 79 } 80 } 81 55 82 /// Reads streaminfo from SV7 header. 56 staticmpc_status57 streaminfo_read_header_sv7(mpc_streaminfo* si, mpc_ uint32_t HeaderData[8])83 mpc_status 84 streaminfo_read_header_sv7(mpc_streaminfo* si, mpc_bits_reader * r) 58 85 { 59 86 mpc_uint16_t Estimatedpeak_title = 0; 60 87 61 if (si->stream_version > 0x71) { 62 // Update (si->stream_version); 63 return MPC_STATUS_OK; 64 } 65 66 si->bitrate = 0; 67 si->frames = HeaderData[1]; 68 si->is = 0; 69 si->ms = (HeaderData[2] >> 30) & 0x0001; 70 si->max_band = (HeaderData[2] >> 24) & 0x003F; 71 si->block_size = 1; 72 si->profile = (HeaderData[2] << 8) >> 28; 88 si->bitrate = 0; 89 si->block_size = 1; 90 si->frames = mpc_bits_read(r, 32); 91 si->is = mpc_bits_read(r, 1); // should be 0 92 si->ms = mpc_bits_read(r, 1); 93 si->max_band = mpc_bits_read(r, 6); 94 si->profile = mpc_bits_read(r, 4); 73 95 si->profile_name = mpc_get_version_string(si->profile); 74 si->sample_freq = samplefreqs[(HeaderData[2] >> 16) & 0x0003]; 75 Estimatedpeak_title = (mpc_uint16_t) (HeaderData[2] & 0xFFFF); // read the ReplayGain data 76 si->gain_title = (mpc_uint16_t) ((HeaderData[3] >> 16) & 0xFFFF); 77 si->peak_title = (mpc_uint16_t) (HeaderData[3] & 0xFFFF); 78 si->gain_album = (mpc_uint16_t) ((HeaderData[4] >> 16) & 0xFFFF); 79 si->peak_album = (mpc_uint16_t) (HeaderData[4] & 0xFFFF); 80 si->is_true_gapless = (HeaderData[5] >> 31) & 0x0001; // true gapless: used? 81 si->last_frame_samples = (HeaderData[5] >> 20) & 0x07FF; // true gapless: valid samples for last frame 82 si->fast_seek = (HeaderData[5] >> 19) & 0x0001; // fast seeking 83 si->encoder_version = (HeaderData[6] >> 24) & 0x00FF; 96 mpc_bits_read(r, 2); // Link ? 97 si->sample_freq = samplefreqs[mpc_bits_read(r, 2)]; 98 Estimatedpeak_title = (mpc_uint16_t) mpc_bits_read(r, 16); // read the ReplayGain data 99 si->gain_title = (mpc_uint16_t) mpc_bits_read(r, 16); 100 si->peak_title = (mpc_uint16_t) mpc_bits_read(r, 16); 101 si->gain_album = (mpc_uint16_t) mpc_bits_read(r, 16); 102 si->peak_album = (mpc_uint16_t) mpc_bits_read(r, 16); 103 si->is_true_gapless = mpc_bits_read(r, 1); // true gapless: used? 104 si->last_frame_samples = mpc_bits_read(r, 11); // true gapless: valid samples for last frame 105 si->fast_seek = mpc_bits_read(r, 1); // fast seeking 106 mpc_bits_read(r, 19); // unused 107 si->encoder_version = mpc_bits_read(r, 8); 84 108 si->channels = 2; 85 109 86 if (si->encoder_version == 0) { 87 sprintf(si->encoder, "Buschmann 1.7.0...9, Klemm 0.90...1.05"); 88 } 89 else { 90 switch (si->encoder_version % 10) { 91 case 0: 92 sprintf(si->encoder, "Release %u.%u", si->encoder_version / 100, 93 si->encoder_version / 10 % 10); 94 break; 95 case 2: case 4: case 6: case 8: 96 sprintf(si->encoder, "Beta %u.%02u", si->encoder_version / 100, 97 si->encoder_version % 100); 98 break; 99 default: 100 sprintf(si->encoder, "--Alpha-- %u.%02u", 101 si->encoder_version / 100, si->encoder_version % 100); 102 break; 103 } 104 } 110 mpc_get_encoder_string(si); 111 112 // estimation, exact value needs too much time 113 si->pcm_samples = 1152 * si->frames - 576; 114 si->average_bitrate = 0; 115 if (si->pcm_samples > 0) 116 si->average_bitrate = (si->tag_offset - si->header_position) * 8.0 117 * si->sample_freq / si->pcm_samples; 105 118 106 119 return MPC_STATUS_OK; … … 108 121 109 122 /// Reads streaminfo from SV8 header. 110 staticmpc_status111 streaminfo_read_header_sv8(mpc_streaminfo* si, mpc_reader * p_reader)123 mpc_status 124 streaminfo_read_header_sv8(mpc_streaminfo* si, const mpc_bits_reader * r_in) 112 125 { 113 int ret;114 mpc_block_t block;115 mpc_bits_reader bits_reader = {0, 0};116 126 mpc_uint32_t CRC; 117 mpc_int32_t header_pos;118 unsigned char tmp;119 127 mpc_uint64_t sampleCount = 0; 120 121 ret = mpc_find_block(p_reader, &block, "SI", "AD"); 122 if (ret != MPC_STATUS_OK) 123 return ret; 124 125 header_pos = p_reader->tell(p_reader); 128 mpc_bits_reader r = *r_in; 126 129 127 130 // FIXME : add CRC check 128 CRC = mpc_read_bits(p_reader, &bits_reader, 32); 129 si->stream_version = mpc_read_bits(p_reader, &bits_reader, 8); 130 131 do { 132 p_reader->read(p_reader, &tmp, 1); 133 sampleCount = (sampleCount << 7) | (tmp & 0x7F); 134 } while((tmp & 0x80)); 135 131 CRC = mpc_bits_read(&r, 32); 132 si->stream_version = mpc_bits_read(&r, 8); 133 mpc_bits_get_size(&r, &sampleCount); 136 134 si->frames = (sampleCount + MPC_FRAME_LENGTH - 1) / MPC_FRAME_LENGTH; 137 135 si->is_true_gapless = 1; 138 136 si->last_frame_samples = sampleCount - (si->frames - 1) * MPC_FRAME_LENGTH; 139 si->sample_freq = samplefreqs[mpc_ read_bits(p_reader, &bits_reader, 4)];140 si->channels = mpc_ read_bits(p_reader, &bits_reader, 4) + 1;141 si->max_band = mpc_ read_bits(p_reader, &bits_reader, 5) + 1;137 si->sample_freq = samplefreqs[mpc_bits_read(&r, 4)]; 138 si->channels = mpc_bits_read(&r, 4) + 1; 139 si->max_band = mpc_bits_read(&r, 5) + 1; 142 140 // FIXME : this flag will be removed, must be 0 143 si->is = mpc_ read_bits(p_reader, &bits_reader, 1);144 si->ms = mpc_ read_bits(p_reader, &bits_reader, 1);141 si->is = mpc_bits_read(&r, 1); 142 si->ms = mpc_bits_read(&r, 1); 145 143 146 144 si->bitrate = 0; … … 152 150 si->average_bitrate = (si->tag_offset - si->header_position) * 8.0 153 151 * si->sample_freq / si->pcm_samples; 154 155 // seek to the end of the block156 p_reader->seek(p_reader, header_pos + block.size);157 158 return MPC_STATUS_OK;159 }160 161 // reads file header and tags162 mpc_status163 mpc_streaminfo_init(mpc_streaminfo * si, mpc_reader *p_reader)164 {165 mpc_uint32_t headerData[8]; int err;166 167 memset(si, 0, sizeof *si);168 // get header position169 err = si->header_position = mpc_skip_id3v2(p_reader);170 if(err < 0) return MPC_STATUS_FILE;171 172 // seek to first byte of mpc data173 err = p_reader->seek(p_reader, si->header_position);174 if(!err) return MPC_STATUS_FILE;175 176 // read magic177 err = p_reader->read(p_reader, headerData, 4);178 if(err != 4) return MPC_STATUS_FILE;179 180 if (memcmp(headerData, "MP+", 3) == 0) {181 // SV 4-7182 err = p_reader->read(p_reader, headerData + 1, 7 * 4);183 if(err != 7 * 4) return MPC_STATUS_FILE;184 err = p_reader->seek(p_reader, si->header_position + 6 * 4);185 if(!err) return MPC_STATUS_FILE;186 187 err = p_reader->get_size(p_reader);188 if(err < 0) return MPC_STATUS_FILE;189 si->tag_offset = si->total_file_length = err;190 191 #ifndef MPC_LITTLE_ENDIAN192 {193 mpc_uint32_t ptr;194 for (ptr = 0; ptr < 8; ptr++)195 headerData[ptr] = mpc_swap32(headerData[ptr]);196 }197 #endif198 si->stream_version = headerData[0] >> 24;199 200 if ((si->stream_version & 15) >= 8)201 return MPC_STATUS_INVALIDSV;202 else if ((si->stream_version & 15) == 7) {203 err = streaminfo_read_header_sv7(si, headerData);204 if(err < 0) return err;205 }206 207 // estimation, exact value needs too much time208 si->pcm_samples = 1152 * si->frames - 576;209 si->average_bitrate = 0;210 if (si->pcm_samples > 0)211 si->average_bitrate = (si->tag_offset - si->header_position) * 8.0212 * si->sample_freq / si->pcm_samples;213 } else if (memcmp(headerData, "MPCK", 4) == 0) {214 // SV 8215 printf("sv8\n");216 streaminfo_read_header_sv8(si, p_reader);217 } else218 return MPC_STATUS_INVALIDSV;219 152 220 153 return MPC_STATUS_OK;
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