diff options
Diffstat (limited to 'src/modules/bluetooth/a2dp-codec-sbc.c')
| -rw-r--r-- | src/modules/bluetooth/a2dp-codec-sbc.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/src/modules/bluetooth/a2dp-codec-sbc.c b/src/modules/bluetooth/a2dp-codec-sbc.c index 6c6f99bb8..e912ffb89 100644 --- a/src/modules/bluetooth/a2dp-codec-sbc.c +++ b/src/modules/bluetooth/a2dp-codec-sbc.c @@ -884,7 +884,7 @@ static void *init_faststream(bool for_encoding, bool for_backchannel, const uint pa_assert_not_reached(); } - sample_spec->channels = 1; + sample_spec->channels = 2; sbc_info->mode = SBC_MODE_MONO; sbc_info->initial_bitpool = sbc_info->min_bitpool = sbc_info->max_bitpool = 32; @@ -1275,9 +1275,10 @@ static size_t decode_buffer_faststream(void *codec_info, const uint8_t *input_bu size_t to_write, to_decode; pa_sample_spec decoded_sample_spec = { .format = PA_SAMPLE_S16LE, - .channels = 1, + .channels = 2, .rate = 16000U }; + uint8_t decode_buffer[4096]; p = input_buffer; to_decode = input_size; @@ -1291,25 +1292,37 @@ static size_t decode_buffer_faststream(void *codec_info, const uint8_t *input_bu decoded = sbc_decode(&sbc_info->sbc, p, to_decode, - d, to_write, + decode_buffer, sizeof(decode_buffer), &written); if (PA_UNLIKELY(decoded <= 0)) { pa_log_error("FastStream SBC decoding error (%li)", (long) decoded); decoded = PA_MIN(sbc_info->frame_length, to_decode); written = PA_MIN(sbc_info->codesize, to_write); - pa_silence_memory(d, written, &decoded_sample_spec); + pa_silence_memory(decode_buffer, written, &decoded_sample_spec); } else { /* Reset codesize and frame_length to values found by decoder */ sbc_info->codesize = sbc_get_codesize(&sbc_info->sbc); sbc_info->frame_length = sbc_get_frame_length(&sbc_info->sbc); + if (sbc_info->mode != sbc_info->sbc.mode) + sbc_info->mode = sbc_info->sbc.mode; + if (sbc_info->frequency != sbc_info->sbc.frequency) { /* some devices unexpectedly return SBC frequency different from 16000 * remember this, and keep incoming sample rate at 16000 */ pa_log_debug("FastStream decoder detected SBC frequency %u, expected %u", sbc_info->sbc.frequency, sbc_info->frequency); sbc_info->frequency = sbc_info->sbc.frequency; } + + if (sbc_info->sbc.mode == SBC_MODE_MONO) { + const void *interleave_buf[2] = {decode_buffer, decode_buffer}; + /* mono->stereo conversion needs to fit into remaining output space */ + written = PA_MIN(to_write / 2, written); + pa_interleave(interleave_buf, 2, d, pa_sample_size(&decoded_sample_spec), written / pa_sample_size(&decoded_sample_spec)); + written *= 2; + } else + memcpy(d, decode_buffer, written); } if ((sbc_info->frame_length & 1) && decoded < to_decode) { |