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Select input buffer 1 if needed, and hookup sequence offset.

This commit is contained in:
Dr. Chat 2015-05-28 21:58:39 -05:00
parent 4675a1e17a
commit 73daf9cedc
1 changed files with 33 additions and 17 deletions
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50
src/xenia/apu/audio_system.cc
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@ -362,7 +362,7 @@ void AudioSystem::ProcessXmaContext(XMAContext& context, XMAContextData& data) {
while (data.output_buffer_valid) {
// Check the output buffer - we cannot decode anything else if it's
// unavailable.
// Output buffers are in frames.
// Output buffers are in raw PCM samples, 256 bytes per block.
uint32_t output_size_bytes = data.output_buffer_block_count * 256;
uint32_t output_offset_bytes = data.output_buffer_write_offset * 256;
uint32_t output_remaining_bytes = output_size_bytes - output_offset_bytes;
@ -423,24 +423,39 @@ void AudioSystem::ProcessXmaContext(XMAContext& context, XMAContextData& data) {
}
int channels = data.is_stereo ? 2 : 1;
// See if we've finished with the input
// TODO - Probably need to move this, I think it might skip the very
// last packet (see the call to PreparePacket)
// Block count is in frames, so expand by
// samples_per_frame*bytes_per_sample*bits_per_byte.
uint32_t input_size_bytes =
(data.input_buffer_0_block_count + data.input_buffer_1_block_count) *
2048;
// See if we've finished with the input.
// Block count is in packets, so expand by packet size.
uint32_t input_size_0_bytes =
(data.input_buffer_0_block_count) * 2048;
uint32_t input_size_1_bytes =
(data.input_buffer_1_block_count) * 2048;
// Total input size
uint32_t input_size_bytes = input_size_0_bytes + input_size_1_bytes;
// Input read offset is in bits. Typically starts at 32 (4 bytes).
uint32_t input_offset_bytes =
// "Sequence" offset - used internally for WMA Pro decoder.
// Just the read offset.
uint32_t seq_offset_bytes =
(data.input_buffer_read_offset & ~0x7FF) / 8;
if (input_offset_bytes < input_size_bytes) {
if (seq_offset_bytes < input_size_bytes) {
// Setup input offset and input buffer.
uint32_t input_offset_bytes = seq_offset_bytes;
auto input_buffer = in0;
if (seq_offset_bytes >= input_size_0_bytes) {
// Size overlap, select input buffer 1.
input_offset_bytes -= input_size_0_bytes;
input_buffer = in1;
}
// Still have data to read.
// TODO: Select input buffer 1 if necessary.
auto packet = in0 + input_offset_bytes;
context.decoder->PreparePacket(packet, 2048, sample_rate, channels);
auto packet = input_buffer + input_offset_bytes;
context.decoder->PreparePacket(packet, seq_offset_bytes, 2048,
sample_rate, channels);
data.input_buffer_read_offset += 2048 * 8;
if (input_offset_bytes + 2048 >= input_size_bytes) {
if (seq_offset_bytes + 2048 >= input_size_bytes) {
// Used the last of the data.
data.input_buffer_0_valid = 0;
data.input_buffer_1_valid = 0;
@ -515,8 +530,9 @@ void AudioSystem::WriteRegister(uint32_t addr, uint64_t value) {
XELOGAPU(
"AudioSystem: kicking context %d (%d/%d bytes)", context_id,
data.input_buffer_read_offset / 8,
data.input_buffer_0_block_count * XMAContextData::kBytesPerBlock);
(data.input_buffer_read_offset & ~0x7FF) / 8,
(data.input_buffer_0_block_count + data.input_buffer_1_block_count)
* XMAContextData::kBytesPerBlock);
// Reset valid flags so our audio decoder knows to process this one.
data.input_buffer_0_valid = data.input_buffer_0_ptr != 0;