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libeplayer3/writer/pcm: simplify

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Origin commit data
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Branch: master
Commit: 8b416c8c16
Author: martii <m4rtii@gmx.de>
Date: 2014-04-26 (Sat, 26 Apr 2014)


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No further description and justification available within origin commit message!

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This commit was generated by Migit
This commit is contained in:
martii
2014-04-26 14:53:02 +02:00
parent e2cb8d8667
commit e931f448bf
1 changed files with 45 additions and 49 deletions
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94
libeplayer3/writer/pcm.cpp
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@@ -24,8 +24,10 @@
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <sys/uio.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/uio.h>
#include <linux/dvb/audio.h>
#include "misc.h"
#include "pes.h"
@@ -60,7 +62,8 @@ class WriterPCM : public Writer
unsigned int SubFrameLen;
unsigned int SubFramesPerPES;
uint8_t lpcm_prv[14];
uint8_t breakBuffer[8192];
uint8_t injectBuffer[2048];
uint8_t breakBuffer[sizeof(injectBuffer)];
unsigned int breakBufferFillSize;
int uNoOfChannels;
int uSampleRate;
@@ -77,7 +80,7 @@ class WriterPCM : public Writer
public:
bool Write(int fd, AVFormatContext *avfc, AVStream *stream, AVPacket *packet, int64_t pts);
bool prepareClipPlay();
int writePCM(int fd, int64_t Pts, uint8_t *data, unsigned int size);
bool writePCM(int fd, int64_t Pts, uint8_t *data, unsigned int size);
void Init();
WriterPCM();
};
@@ -120,11 +123,11 @@ bool WriterPCM::prepareClipPlay()
}
SubFrameLen *= uNoOfChannels;
SubFrameLen *= (uBitsPerSample / 8);
SubFrameLen *= uBitsPerSample / 8;
//rewrite PES size to have as many complete subframes per PES as we can
// FIXME: PES header size was hardcoded to 18 in earlier code. Actual size returned by InsertPesHeader is 14.
SubFramesPerPES = ((2048 - 18) - sizeof(lpcm_prv)) / SubFrameLen;
SubFramesPerPES = ((sizeof(injectBuffer) - 18) - sizeof(lpcm_prv)) / SubFrameLen;
SubFrameLen *= SubFramesPerPES;
//set number of channels
@@ -143,59 +146,40 @@ bool WriterPCM::prepareClipPlay()
return true;
}
int WriterPCM::writePCM(int fd, int64_t Pts, uint8_t *data, unsigned int size)
bool WriterPCM::writePCM(int fd, int64_t Pts, uint8_t *data, unsigned int size)
{
bool res = true;
uint8_t PesHeader[PES_MAX_HEADER_SIZE];
if (initialHeader) {
initialHeader = false;
prepareClipPlay();
ioctl(fd, AUDIO_CLEAR_BUFFER, NULL);
}
unsigned int n;
uint8_t *injectBuffer = (uint8_t *) malloc(SubFrameLen);
unsigned int pos;
size += breakBufferFillSize;
for (pos = 0; pos < size;) {
//printf("PCM %s - Position=%d\n", __FUNCTION__, pos);
if ((size - pos) < SubFrameLen) {
breakBufferFillSize = size - pos;
memcpy(breakBuffer, &data[pos], sizeof(uint8_t) * breakBufferFillSize);
//printf("PCM %s - Unplayed=%d\n", __FUNCTION__, breakBufferFillSize);
break;
}
//get first PES's worth
if (breakBufferFillSize > 0) {
memcpy(injectBuffer, breakBuffer, sizeof(uint8_t) * breakBufferFillSize);
memcpy(&injectBuffer[breakBufferFillSize], &data[pos], sizeof(uint8_t) * (SubFrameLen - breakBufferFillSize));
pos += (SubFrameLen - breakBufferFillSize);
breakBufferFillSize = 0;
} else {
memcpy(injectBuffer, &data[pos], sizeof(uint8_t) * SubFrameLen);
pos += SubFrameLen;
}
struct iovec iov[3];
iov[0].iov_base = PesHeader;
iov[1].iov_base = lpcm_prv;
iov[1].iov_len = sizeof(lpcm_prv);
iov[2].iov_base = injectBuffer;
iov[2].iov_len = SubFrameLen;
while (size >= SubFrameLen) {
if (breakBufferFillSize)
memcpy(injectBuffer, breakBuffer, breakBufferFillSize);
memcpy(injectBuffer + breakBufferFillSize, data, SubFrameLen - breakBufferFillSize);
size -= SubFrameLen;
data += SubFrameLen - breakBufferFillSize;
breakBufferFillSize = 0;
//write the PCM data
if (uBitsPerSample == 16) {
for (n = 0; n < SubFrameLen; n += 2) {
for (unsigned int n = 0; n < SubFrameLen; n += 2) {
uint8_t tmp = injectBuffer[n];
injectBuffer[n] = injectBuffer[n + 1];
injectBuffer[n + 1] = tmp;
}
} else {
// 0 1 2 3 4 5 6 7 8 9 10 11
// A1c A1b A1a-B1c B1b B1a-A2c A2b A2a-B2c B2b B2a
// to A1a A1b B1a B1b.A2a A2b B2a B2b-A1c B1c A2c B2c
for (n = 0; n < SubFrameLen; n += 12) {
uint8_t t, *p = &injectBuffer[n];
// 0 1 2 3 4 5 6 7 8 9 10 11
// A1c A1b A1a B1c B1b B1a A2c A2b A2a B2c B2b B2a
// to A1a A1b B1a B1b A2a A2b B2a B2b A1c B1c A2c B2c
for (unsigned int n = 0; n < SubFrameLen; n += 12) {
uint8_t t, *p = injectBuffer + n;
t = p[0];
p[0] = p[2];
p[2] = p[5];
@@ -212,14 +196,25 @@ int WriterPCM::writePCM(int fd, int64_t Pts, uint8_t *data, unsigned int size)
//increment err... subframe count?
lpcm_prv[1] = ((lpcm_prv[1] + SubFramesPerPES) & 0x1F);
struct iovec iov[3];
iov[0].iov_base = PesHeader;
iov[1].iov_base = lpcm_prv;
iov[1].iov_len = sizeof(lpcm_prv);
iov[2].iov_base = injectBuffer;
iov[2].iov_len = SubFrameLen;
iov[0].iov_len = InsertPesHeader(PesHeader, iov[1].iov_len + iov[2].iov_len, PCM_PES_START_CODE, Pts, 0);
int len = writev(fd, iov, 3);
if (len < 0)
if (len < 0) {
res = false;
break;
}
}
if (size) {
breakBufferFillSize = size;
memcpy(breakBuffer, data, size);
}
free(injectBuffer);
return size;
return res;
}
void WriterPCM::Init()
@@ -331,7 +326,11 @@ bool WriterPCM::Write(int fd, AVFormatContext * /*avfc*/, AVStream *stream, AVPa
}
out_samples = swr_convert(swr, &output, out_samples, (const uint8_t **) &decoded_frame->data[0], in_samples);
writePCM(fd, pts, output, out_samples * sizeof(short) * out_channels);
if(!writePCM(fd, pts, output, out_samples * sizeof(short) * out_channels)) {
restart_audio_resampling = true;
av_free(output);
break;
}
av_free(output);
pts = 0;
@@ -343,12 +342,9 @@ WriterPCM::WriterPCM()
{
swr = NULL;
decoded_frame = NULL;
out_sample_rate = 44100;
out_channels = 2;
out_channel_layout = AV_CH_LAYOUT_STEREO;
restart_audio_resampling = true;
Register(this, AV_CODEC_ID_INJECTPCM, AUDIO_ENCODING_LPCMA);
Init();
}
static WriterPCM writer_pcm __attribute__ ((init_priority (300)));