int MP4_moov_uuid_parse(uint8_t *uuid_data, uint32_t data_len, char *title)
{
uint8_t *data = uuid_data;
uint32_t uuid_len = read_be32(data);
data += sizeof(uint32_t);
if ( uuid_len != data_len ) {
return 0;
}
//printf("uuid len = %08lx\n", uuid_len);
// "MTDT" tag expected
uint32_t tag = read_be32(data);
if ( tag != 0x4d544454 ) {
return 0;
}
data += sizeof(uint32_t);
//printf("tag = %08lx\n", tag);
if ( read_be16(data) != 0x0001 ) {
return 0;
}
data += sizeof(uint16_t);
uint16_t title_len = (read_be16(data) - 10) / 2;
data += sizeof(uint16_t);
if ( read_be32(data) != 0x00000001 ) {
return 0;
}
data += sizeof(uint32_t);
uint16_t lang_code = read_be16(data);
data += sizeof(uint16_t);
if ( read_be16(data) != 0x0001 ) {
return 0;
}
data += sizeof(uint16_t);
//printf("title len = %04lx (%d) \n", title_len, title_len);
if ( title_len > (data_len - (data - uuid_data)) ) {
title_len = data_len - (data - uuid_data) - 1;
}
for(uint16_t i = 0; i < title_len; i++) {
uint16_t wc = read_be16(data);
//printf("\twc=%04x\n", wc);
data += sizeof(uint16_t);
title[i] = (char)(wc & 0xff);
}
title[title_len] = 0;
return 1;
}
aiffStream(std::istream *_fstream)
: alureStream(_fstream), format(0), dataStart(0)
{
ALubyte buffer[25];
int length;
if(!fstream->read(reinterpret_cast<char*>(buffer), 12) ||
memcmp(buffer, "FORM", 4) != 0 || memcmp(buffer+8, "AIFF", 4) != 0)
return;
while(!dataStart || format == AL_NONE)
{
char tag[4];
if(!fstream->read(tag, 4))
break;
/* read chunk length */
length = read_be32(fstream);
if(memcmp(tag, "COMM", 4) == 0 && length >= 18)
{
/* mono or stereo data */
channels = read_be16(fstream);
/* number of sample frames */
fstream->ignore(4);
/* bits per sample */
sampleSize = read_be16(fstream) / 8;
/* sample frequency */
samplerate = read_be80extended(fstream);
/* block alignment */
blockAlign = channels * sampleSize;
format = GetSampleFormat(channels, sampleSize*8, false);
length -= 18;
}
else if(memcmp(tag, "SSND", 4) == 0)
{
dataStart = fstream->tellg();
dataStart += 8;
dataLen = remLen = length - 8;
}
fstream->seekg(length, std::ios_base::cur);
}
if(dataStart > 0 && format != AL_NONE)
fstream->seekg(dataStart);
}
static vod_status_t
mp4_decrypt_start_frame(void* ctx, input_frame_t* frame)
{
mp4_decrypt_state_t* state = ctx;
vod_status_t rc;
rc = state->frames_source->start_frame(state->frames_source_context, frame);
if (rc != VOD_OK)
{
return rc;
}
// get the iv
if (state->auxiliary_info_pos + MP4_AES_CTR_IV_SIZE > state->auxiliary_info_end)
{
vod_log_error(VOD_LOG_ERR, state->request_context->log, 0,
"mp4_decrypt_start_frame: failed to get iv from auxiliary info");
return VOD_BAD_DATA;
}
mp4_aes_ctr_set_iv(&state->cipher, state->auxiliary_info_pos);
state->auxiliary_info_pos += MP4_AES_CTR_IV_SIZE;
if (!state->use_subsamples)
{
state->encrypted_bytes = UINT_MAX;
return VOD_OK;
}
// get the subsample info
if (state->auxiliary_info_pos + sizeof(uint16_t) + sizeof(cenc_sample_auxiliary_data_subsample_t) > state->auxiliary_info_end)
{
vod_log_error(VOD_LOG_ERR, state->request_context->log, 0,
"mp4_decrypt_start_frame: failed to get subsample info from auxiliary info");
return VOD_BAD_DATA;
}
read_be16(state->auxiliary_info_pos, state->subsample_count);
if (state->subsample_count <= 0)
{
vod_log_error(VOD_LOG_ERR, state->request_context->log, 0,
"mp4_decrypt_start_frame: invalid subsample count");
return VOD_BAD_DATA;
}
read_be16(state->auxiliary_info_pos, state->clear_bytes);
read_be32(state->auxiliary_info_pos, state->encrypted_bytes);
state->subsample_count--;
return VOD_OK;
}
int mb_pa_resp_writen(mb_msg *buf, uint16_t *addr, size_t *awords)
{
int e;
if(!buf) return(MB_ENOBUF);
uint8_t fn;
if((e=mb_pa_resp_fn(buf, &fn))) return(e);
if(fn!=MB_FN_WRITEN) return(MB_EBADBUF); // not a writen message
if((e=mb_respbuflen(buf, 8))) return(e);
if((e=mb_pa_resp_checkcrc(buf))) return(e);
if(addr) *addr=read_be16(buf->data+2);
if(awords) *awords=read_be16(buf->data+4);
return(MB_EOK);
}
fluidStream(std::istream *_fstream)
: alureStream(_fstream), Divisions(100),
format(AL_NONE), sampleRate(48000), samplesPerTick(1.),
fluidSettings(NULL), fluidSynth(NULL), fontID(FLUID_FAILED),
doFontLoad(true)
{
if(!fsynth_handle) return;
ALCdevice *device = alcGetContextsDevice(alcGetCurrentContext());
if(device) alcGetIntegerv(device, ALC_FREQUENCY, 1, &sampleRate);
char hdr[4];
if(!fstream->read(hdr, 4))
return;
if(memcmp(hdr, "MThd", 4) == 0)
{
ALuint len = read_be32(fstream);
if(len != 6)
return;
int type = read_be16(fstream);
if(type != 0 && type != 1)
return;
ALuint numtracks = read_be16(fstream);
Divisions = read_be16(fstream);
UpdateTempo(500000);
Tracks.resize(numtracks);
for(std::vector<MidiTrack>::iterator i = Tracks.begin(), end = Tracks.end();i != end;i++)
{
if(!fstream->read(hdr, 4) || memcmp(hdr, "MTrk", 4) != 0)
return;
ALint len = read_be32(fstream);
i->data.resize(len);
if(!fstream->read(reinterpret_cast<char*>(&i->data[0]), len) ||
fstream->gcount() != len)
return;
unsigned long val = i->ReadVarLen();
i->SamplesLeft += val * samplesPerTick;
}
SetupSynth();
}
}
// Response parsers (mb_pa_resp_*) interrogate a response datagram
// First arg is always const mb_msg *buf, the datagram to decode
int mb_pa_resp_checkcrc(const mb_msg *buf)
{
if(!buf) return(MB_ENOBUF);
if(buf->len<2) return(MB_EMSHORT);
int e;
uint16_t crc;
if((e=mb_crc16(buf, &crc))) return(e);
uint16_t read_crc=read_be16(buf->data+buf->len-2);
if(crc!=read_crc) return(MB_EBADBUF);
return(MB_EOK);
}
int mb_pa_resp_readn(mb_msg *buf, size_t words, size_t *awords, uint16_t *vals)
{
int e;
if(!buf) return(MB_ENOBUF);
uint8_t fn;
if((e=mb_pa_resp_fn(buf, &fn))) return(e);
if(!mb_is_fn_readn(fn)) return(MB_EBADBUF); // not a readn message
if(buf->len<3) return(MB_EMSHORT);
size_t nbytes=buf->data[2];
if((e=mb_respbuflen(buf, nbytes+5))) return(e);
if((e=mb_pa_resp_checkcrc(buf))) return(e);
if(nbytes&1) return(MB_EBADBUF); // nbytes should always be even
size_t rwords=nbytes/2;
if(awords) *awords=rwords;
for(size_t i=0;(i<words)&&(i<rwords);i++)
{
if(vals) vals[i]=read_be16(buf->data+3+(i<<1));
}
if(words<rwords) return(MB_EDLONG);
return(MB_EOK);
}
vod_status_t
codec_config_avcc_get_nal_units(
request_context_t* request_context,
const u_char* extra_data,
uint32_t extra_data_size,
bool_t size_only,
uint32_t* nal_packet_size_length,
u_char** result,
uint32_t* result_size)
{
const u_char* extra_data_end = extra_data + extra_data_size;
const u_char* cur_pos;
u_char* p;
size_t actual_size;
uint16_t unit_size;
int unit_count;
int i;
if (extra_data_size < sizeof(avcc_config_t))
{
vod_log_error(VOD_LOG_ERR, request_context->log, 0,
"codec_config_avcc_get_nal_units: extra data size %uD too small", extra_data_size);
return VOD_BAD_DATA;
}
*nal_packet_size_length = (((avcc_config_t*)extra_data)->nula_length_size & 0x3) + 1;
// calculate total size and validate
*result_size = 0;
cur_pos = extra_data + sizeof(avcc_config_t);
for (i = 0; i < 2; i++) // once for SPS, once for PPS
{
if (cur_pos >= extra_data_end)
{
vod_log_error(VOD_LOG_ERR, request_context->log, 0,
"codec_config_avcc_get_nal_units: extra data overflow while reading unit count");
return VOD_BAD_DATA;
}
for (unit_count = (*cur_pos++ & 0x1f); unit_count; unit_count--)
{
if (cur_pos + sizeof(uint16_t) > extra_data_end)
{
vod_log_error(VOD_LOG_ERR, request_context->log, 0,
"codec_config_avcc_get_nal_units: extra data overflow while reading unit size");
return VOD_BAD_DATA;
}
read_be16(cur_pos, unit_size);
if (cur_pos + unit_size > extra_data_end)
{
vod_log_error(VOD_LOG_ERR, request_context->log, 0,
"codec_config_avcc_get_nal_units: unit size %uD overflows the extra data buffer", (uint32_t)unit_size);
return VOD_BAD_DATA;
}
cur_pos += unit_size;
*result_size += sizeof(uint32_t) + unit_size;
}
}
if (size_only)
{
*result = NULL;
return VOD_OK;
}
// allocate buffer
p = vod_alloc(request_context->pool, *result_size);
if (p == NULL)
{
vod_log_debug0(VOD_LOG_DEBUG_LEVEL, request_context->log, 0,
"codec_config_avcc_get_nal_units: vod_alloc failed");
return VOD_ALLOC_FAILED;
}
*result = p;
// copy data
cur_pos = extra_data + sizeof(avcc_config_t);
for (i = 0; i < 2; i++) // once for SPS, once for PPS
{
for (unit_count = *cur_pos++ & 0x1f; unit_count; unit_count--)
{
unit_size = parse_be16(cur_pos);
cur_pos += sizeof(uint16_t);
*((uint32_t*)p) = 0x01000000;
p += sizeof(uint32_t);
vod_memcpy(p, cur_pos, unit_size);
cur_pos += unit_size;
p += unit_size;
}
}
actual_size = p - *result;
if (actual_size != *result_size)
{
vod_log_error(VOD_LOG_ERR, request_context->log, 0,
"codec_config_avcc_get_nal_units: actual extra data size %uz is different than calculated size %uD",
actual_size, *result_size);
return VOD_UNEXPECTED;
}
vod_log_buffer(VOD_LOG_DEBUG_LEVEL, request_context->log, 0, "codec_config_avcc_get_nal_units: parsed extra data ", *result, *result_size);
return VOD_OK;
}
vod_status_t
codec_config_hevc_get_nal_units(
request_context_t* request_context,
const u_char* extra_data,
uint32_t extra_data_size,
bool_t size_only,
uint32_t* nal_packet_size_length,
u_char** result,
uint32_t* result_size)
{
hevc_config_t cfg;
vod_status_t rc;
const u_char* start_pos;
const u_char* cur_pos;
const u_char* end_pos;
size_t actual_size;
uint16_t unit_size;
uint16_t count;
uint8_t type_count;
u_char* p;
rc = codec_config_hevc_config_parse(request_context, extra_data, extra_data_size, &cfg, &start_pos);
if (rc != VOD_OK)
{
return rc;
}
*nal_packet_size_length = cfg.nal_unit_size;
end_pos = extra_data + extra_data_size;
// calculate total size and validate
*result_size = 0;
cur_pos = start_pos;
if (cur_pos >= end_pos)
{
vod_log_error(VOD_LOG_ERR, request_context->log, 0,
"codec_config_hevc_get_nal_units: extra data overflow while reading type count");
return VOD_BAD_DATA;
}
for (type_count = *cur_pos++; type_count > 0; type_count--)
{
if (cur_pos + 3 > end_pos)
{
vod_log_error(VOD_LOG_ERR, request_context->log, 0,
"codec_config_hevc_get_nal_units: extra data overflow while reading type header");
return VOD_BAD_DATA;
}
cur_pos++;
read_be16(cur_pos, count);
for (; count > 0; count--)
{
if (cur_pos + sizeof(uint16_t) > end_pos)
{
vod_log_error(VOD_LOG_ERR, request_context->log, 0,
"codec_config_hevc_get_nal_units: extra data overflow while reading unit size");
return VOD_BAD_DATA;
}
read_be16(cur_pos, unit_size);
cur_pos += unit_size;
if (cur_pos > end_pos)
{
vod_log_error(VOD_LOG_ERR, request_context->log, 0,
"codec_config_hevc_get_nal_units: extra data overflow while reading unit data");
return VOD_BAD_DATA;
}
*result_size += sizeof(uint32_t) + unit_size;
}
}
if (size_only)
{
*result = NULL;
return VOD_OK;
}
// allocate buffer
p = vod_alloc(request_context->pool, *result_size);
if (p == NULL)
{
vod_log_debug0(VOD_LOG_DEBUG_LEVEL, request_context->log, 0,
"codec_config_hevc_get_nal_units: vod_alloc failed");
return VOD_ALLOC_FAILED;
}
*result = p;
// copy data
cur_pos = start_pos;
for (type_count = *cur_pos++; type_count > 0; type_count--)
{
cur_pos++; // unit type
read_be16(cur_pos, count);
for (; count > 0; count--)
{
read_be16(cur_pos, unit_size);
*((uint32_t*)p) = 0x01000000;
p += sizeof(uint32_t);
vod_memcpy(p, cur_pos, unit_size);
p += unit_size;
cur_pos += unit_size;
}
}
// verify size
actual_size = p - *result;
if (actual_size != *result_size)
{
vod_log_error(VOD_LOG_ERR, request_context->log, 0,
"codec_config_hevc_get_nal_units: actual extra data size %uz is different than calculated size %uD",
actual_size, *result_size);
return VOD_UNEXPECTED;
}
vod_log_buffer(VOD_LOG_DEBUG_LEVEL, request_context->log, 0, "codec_config_hevc_get_nal_units: parsed extra data ", *result, *result_size);
return VOD_OK;
}
static vod_status_t
mp4_decrypt_process(
mp4_decrypt_state_t* state,
size_t size)
{
u_char* dest = state->output_pos;
u_char* src = state->input_pos;
vod_status_t rc;
size_t cur_size;
while (size > 0)
{
if (state->clear_bytes <= 0 && state->encrypted_bytes <= 0)
{
// finished a subsample, read the next one
if (state->subsample_count <= 0)
{
vod_log_error(VOD_LOG_ERR, state->request_context->log, 0,
"mp4_decrypt_process: exhausted subsample bytes");
return VOD_BAD_DATA;
}
if (state->auxiliary_info_pos + sizeof(cenc_sample_auxiliary_data_subsample_t) > state->auxiliary_info_end)
{
vod_log_error(VOD_LOG_ERR, state->request_context->log, 0,
"mp4_decrypt_process: failed to get subsample info from auxiliary info");
return VOD_BAD_DATA;
}
read_be16(state->auxiliary_info_pos, state->clear_bytes);
read_be32(state->auxiliary_info_pos, state->encrypted_bytes);
state->subsample_count--;
}
if (state->clear_bytes > 0)
{
// copy clear bytes
cur_size = vod_min(state->clear_bytes, size);
dest = vod_copy(dest, src, cur_size);
src += cur_size;
size -= cur_size;
state->clear_bytes -= cur_size;
}
// decrypt encrypted bytes
cur_size = vod_min(state->encrypted_bytes, size);
rc = mp4_aes_ctr_process(&state->cipher, dest, src, cur_size);
if (rc != VOD_OK)
{
return rc;
}
dest += cur_size;
src += cur_size;
size -= cur_size;
state->encrypted_bytes -= cur_size;
}
state->output_pos = dest;
state->input_pos = src;
return VOD_OK;
}
