#endif
#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
#include <stdarg.h>
#include "pcm_reader.h"
#include "m4af_endian.h"
+#include "catypes.h"
int pcm_read(pcm_io_context_t *io, void *buffer, uint32_t size)
{
va_end(ap);
return count;
}
+
+static
+int channel_compare(const void *a, const void *b)
+{
+ return (*(const uint8_t **)a)[0] - (*(const uint8_t **)b)[0];
+}
+
+void apple_translate_channel_labels(uint8_t *channels, unsigned n)
+{
+ unsigned i;
+ char *has_side = strpbrk((char*)channels, "\x0A\x0B");
+
+ for (i = 0; i < n; ++i) {
+ switch (channels[i]) {
+ case kAudioChannelLabel_LeftSurround:
+ case kAudioChannelLabel_RightSurround:
+ if (!has_side) channels[i] += 5; // map to SL/SR
+ break;
+ case kAudioChannelLabel_RearSurroundLeft:
+ case kAudioChannelLabel_RearSurroundRight:
+ if (!has_side) channels[i] -= 28; // map to BL/BR
+ break;
+ case kAudioChannelLabel_Mono:
+ channels[i] = kAudioChannelLabel_Center;
+ break;
+ }
+ }
+}
+
+int apple_chan_chunk(pcm_io_context_t *io, uint32_t chunk_size,
+ pcm_sample_description_t *fmt, uint8_t *mapping)
+{
+ /*
+ * Although FDK encoder supports upto 5.1ch, we handle upto
+ * 8 channels here.
+ */
+ uint32_t i, mChannelLayoutTag, mChannelBitmap, mNumberChannelDescriptions;
+ uint32_t mask = 0;
+ const uint32_t nchannels = fmt->channels_per_frame;
+ uint8_t channels[9] = { 0 };
+ uint8_t *index[8] = { 0 };
+ const char *layout = 0;
+
+ ENSURE(chunk_size >= 12);
+ TRY_IO(pcm_scanb(io, "LLL", &mChannelLayoutTag, &mChannelBitmap,
+ &mNumberChannelDescriptions) != 3);
+
+ switch (mChannelLayoutTag) {
+ case kAudioChannelLayoutTag_UseChannelBitmap:
+ ENSURE(bitcount(mask) == nchannels);
+ TRY_IO(pcm_skip(io, chunk_size - 12));
+ fmt->channel_mask = mChannelBitmap;
+ for (i = 0; i < nchannels; ++i)
+ mapping[i] = i;
+ return 0;
+ case kAudioChannelLayoutTag_UseChannelDescriptions:
+ ENSURE(mNumberChannelDescriptions == nchannels);
+ ENSURE(chunk_size >= 12 + nchannels * 20);
+ for (i = 0; i < mNumberChannelDescriptions; ++i) {
+ uint32_t mChannelLabel;
+ TRY_IO(pcm_read32be(io, &mChannelLabel));
+ ENSURE(mChannelLabel && mChannelLabel <= 0xff);
+ channels[i] = mChannelLabel;
+ TRY_IO(pcm_skip(io, 16));
+ }
+ TRY_IO(pcm_skip(io, chunk_size - 12 - nchannels * 20));
+ apple_translate_channel_labels(channels, nchannels);
+ for (i = 0; i < nchannels; ++i)
+ if (channels[i] > kAudioChannelLabel_TopBackLeft)
+ goto FAIL;
+ break;
+ default:
+ ENSURE((mChannelLayoutTag & 0xffff) == nchannels);
+ TRY_IO(pcm_skip(io, chunk_size - 12));
+
+ switch (mChannelLayoutTag) {
+ /* 1ch */
+ case kAudioChannelLayoutTag_Mono:
+ layout = "\x03"; break;
+ /* 1.1ch */
+ case kAudioChannelLayoutTag_AC3_1_0_1:
+ layout = "\x03\x04"; break;
+ /* 2ch */
+ case kAudioChannelLayoutTag_Stereo:
+ case kAudioChannelLayoutTag_MatrixStereo:
+ case kAudioChannelLayoutTag_Binaural:
+ layout = "\x01\x02"; break;
+ /* 2.1ch */
+ case kAudioChannelLayoutTag_DVD_4:
+ layout = "\x01\x02\x04"; break;
+ /* 3ch */
+ case kAudioChannelLayoutTag_MPEG_3_0_A:
+ layout = "\x01\x02\x03"; break;
+ case kAudioChannelLayoutTag_AC3_3_0:
+ layout = "\x01\x03\x02"; break;
+ case kAudioChannelLayoutTag_MPEG_3_0_B:
+ layout = "\x03\x01\x02"; break;
+ case kAudioChannelLayoutTag_ITU_2_1:
+ layout = "\x01\x02\x09"; break;
+ /* 3.1ch */
+ case kAudioChannelLayoutTag_DVD_10:
+ layout = "\x01\x02\x03\x04"; break;
+ case kAudioChannelLayoutTag_AC3_3_0_1:
+ layout = "\x01\x03\x02\x04"; break;
+ case kAudioChannelLayoutTag_DVD_5:
+ layout = "\x01\x02\x04\x09"; break;
+ case kAudioChannelLayoutTag_AC3_2_1_1:
+ layout = "\x01\x02\x09\x04"; break;
+ /* 4ch */
+ case kAudioChannelLayoutTag_Quadraphonic:
+ case kAudioChannelLayoutTag_ITU_2_2:
+ layout = "\x01\x02\x0A\x0B"; break;
+ case kAudioChannelLayoutTag_MPEG_4_0_A:
+ layout = "\x01\x02\x03\x09"; break;
+ case kAudioChannelLayoutTag_MPEG_4_0_B:
+ layout = "\x03\x01\x02\x09"; break;
+ case kAudioChannelLayoutTag_AC3_3_1:
+ layout = "\x01\x03\x02\x09"; break;
+ /* 4.1ch */
+ case kAudioChannelLayoutTag_DVD_6:
+ layout = "\x01\x02\x04\x0A\x0B"; break;
+ case kAudioChannelLayoutTag_DVD_18:
+ layout = "\x01\x02\x0A\x0B\x04"; break;
+ case kAudioChannelLayoutTag_DVD_11:
+ layout = "\x01\x02\x03\x04\x09"; break;
+ case kAudioChannelLayoutTag_AC3_3_1_1:
+ layout = "\x01\x03\x02\x09\x04"; break;
+ /* 5ch */
+ case kAudioChannelLayoutTag_MPEG_5_0_A:
+ layout = "\x01\x02\x03\x0A\x0B"; break;
+ case kAudioChannelLayoutTag_Pentagonal:
+ case kAudioChannelLayoutTag_MPEG_5_0_B:
+ layout = "\x01\x02\x0A\x0B\x03"; break;
+ case kAudioChannelLayoutTag_MPEG_5_0_C:
+ layout = "\x01\x03\x02\x0A\x0B"; break;
+ case kAudioChannelLayoutTag_MPEG_5_0_D:
+ layout = "\x03\x01\x02\x0A\x0B"; break;
+ /* 5.1ch */
+ case kAudioChannelLayoutTag_MPEG_5_1_A:
+ layout = "\x01\x02\x03\x04\x0A\x0B"; break;
+ case kAudioChannelLayoutTag_MPEG_5_1_B:
+ layout = "\x01\x02\x0A\x0B\x03\x04"; break;
+ case kAudioChannelLayoutTag_MPEG_5_1_C:
+ layout = "\x01\x03\x02\x0A\x0B\x04"; break;
+ case kAudioChannelLayoutTag_MPEG_5_1_D:
+ layout = "\x03\x01\x02\x0A\x0B\x04"; break;
+ /* 6ch */
+ case kAudioChannelLayoutTag_Hexagonal:
+ case kAudioChannelLayoutTag_AudioUnit_6_0:
+ layout = "\x01\x02\x0A\x0B\x03\x09"; break;
+ case kAudioChannelLayoutTag_AAC_6_0:
+ layout = "\x03\x01\x02\x0A\x0B\x09"; break;
+ /* 6.1ch */
+ case kAudioChannelLayoutTag_MPEG_6_1_A:
+ layout = "\x01\x02\x03\x04\x0A\x0B\x09"; break;
+ case kAudioChannelLayoutTag_AAC_6_1:
+ layout = "\x03\x01\x02\x0A\x0B\x09\x04"; break;
+ /* 7ch */
+ case kAudioChannelLayoutTag_AudioUnit_7_0:
+ layout = "\x01\x02\x0A\x0B\x03\x05\x06"; break;
+ case kAudioChannelLayoutTag_AudioUnit_7_0_Front:
+ layout = "\x01\x02\x0A\x0B\x03\x07\x08"; break;
+ case kAudioChannelLayoutTag_AAC_7_0:
+ layout = "\x03\x01\x02\x0A\x0B\x05\x06"; break;
+ /* 7.1ch */
+ case kAudioChannelLayoutTag_MPEG_7_1_A:
+ layout = "\x01\x02\x03\x04\x0A\x0B\x07\x08"; break;
+ case kAudioChannelLayoutTag_MPEG_7_1_B:
+ layout = "\x03\x07\x08\x01\x02\x05\x06\x04"; break;
+ case kAudioChannelLayoutTag_MPEG_7_1_C:
+ layout = "\x01\x02\x03\x04\x0A\x0B\x05\x06"; break;
+ case kAudioChannelLayoutTag_Emagic_Default_7_1:
+ layout = "\x01\x02\x0A\x0B\x03\x04\x07\x08"; break;
+ /* 8ch */
+ case kAudioChannelLayoutTag_Octagonal:
+ layout = "\x01\x02\x05\x06\x03\x09\x0A\x0B"; break;
+ case kAudioChannelLayoutTag_AAC_Octagonal:
+ layout = "\x03\x01\x02\x0A\x0B\x05\x06\x09"; break;
+ default:
+ goto FAIL;
+ }
+ strcpy((char*)channels, layout);
+ }
+
+ for (i = 0; i < nchannels; ++i)
+ mask |= 1 << (channels[i] - 1);
+ fmt->channel_mask = mask;
+ ENSURE(bitcount(mask) == nchannels);
+
+ for (i = 0; i < nchannels; ++i)
+ index[i] = channels + i;
+ qsort(index, nchannels, sizeof(char*), channel_compare);
+ for (i = 0; i < nchannels; ++i)
+ mapping[i] = index[i] - channels;
+
+ return 0;
+FAIL:
+ return -1;
+}
projects / fdkaac.git / blobdiff