int CProgramConfig_LookupElement(
CProgramConfig *pPce,
UINT channelConfig,
const UINT tag,
const UINT channelIdx,
UCHAR chMapping[],
AUDIO_CHANNEL_TYPE chType[],
UCHAR chIndex[],
UCHAR *elMapping,
MP4_ELEMENT_ID elList[],
MP4_ELEMENT_ID elType
)
{
if (channelConfig > 0)
{
/* Constant channel mapping must have
been set during initialization. */
if ( elType == ID_SCE
|| elType == ID_CPE
|| elType == ID_LFE )
{
*elMapping = pPce->elCounter;
if (elList[pPce->elCounter] != elType) {
/* Not in the list */
if ( (channelConfig == 2) && (elType == ID_SCE) )
{ /* This scenario occurs with HE-AAC v2 streams of buggy encoders.
Due to other decoder implementations decoding of these kind of streams is desired. */
channelConfig = 1;
} else {
return 0;
}
}
/* Assume all front channels */
getImplicitAudioChannelTypeAndIndex(&chType[channelIdx], &chIndex[channelIdx], channelConfig, channelIdx);
if (elType == ID_CPE) {
chType[channelIdx+1] = chType[channelIdx];
chIndex[channelIdx+1] = chIndex[channelIdx]+1;
}
pPce->elCounter++;
}
/* Accept all non-channel elements, too. */
return 1;
}
else
{
#ifdef TP_PCE_ENABLE
if (!pPce->isValid)
#endif /* TP_PCE_ENABLE */
{
/* Implicit channel mapping. */
if ( elType == ID_SCE
|| elType == ID_CPE
|| elType == ID_LFE )
{
/* Store all channel element IDs */
elList[pPce->elCounter] = elType;
*elMapping = pPce->elCounter++;
}
}
#ifdef TP_PCE_ENABLE
else {
/* Accept the additional channel(s), only if the tag is in the lists */
int isCpe = 0, i;
/* Element counter */
int ec[PC_NUM_HEIGHT_LAYER] = {0};
/* Channel counters */
int cc[PC_NUM_HEIGHT_LAYER] = {0};
int fc[PC_NUM_HEIGHT_LAYER] = {0};
int sc[PC_NUM_HEIGHT_LAYER] = {0};
int bc[PC_NUM_HEIGHT_LAYER] = {0};
int lc = 0;;
/* General MPEG (PCE) composition rules:
- Over all:
<normal height channels><top height channels><bottom height channels>
- Within each height layer:
<front channels><side channels><back channels>
- Exception:
The LFE channels have no height info and thus they are arranged at the very
end of the normal height layer channels.
*/
switch (elType)
{
case ID_CPE:
isCpe = 1;
case ID_SCE:
/* search in front channels */
for (i = 0; i < pPce->NumFrontChannelElements; i++) {
int heightLayer = pPce->FrontElementHeightInfo[i];
if (isCpe == pPce->FrontElementIsCpe[i] && pPce->FrontElementTagSelect[i] == tag) {
int h, elIdx = ec[heightLayer], chIdx = cc[heightLayer];
AUDIO_CHANNEL_TYPE aChType = (AUDIO_CHANNEL_TYPE)((heightLayer<<4) | ACT_FRONT);
for (h = heightLayer-1; h >= 0; h-=1) {
int el;
/* Count front channels/elements */
for (el = 0; el < pPce->NumFrontChannelElements; el+=1) {
if (pPce->FrontElementHeightInfo[el] == h) {
elIdx += 1;
chIdx += (pPce->FrontElementIsCpe[el]) ? 2 : 1;
}
}
/* Count side channels/elements */
for (el = 0; el < pPce->NumSideChannelElements; el+=1) {
if (pPce->SideElementHeightInfo[el] == h) {
elIdx += 1;
chIdx += (pPce->SideElementIsCpe[el]) ? 2 : 1;
}
}
/* Count back channels/elements */
for (el = 0; el < pPce->NumBackChannelElements; el+=1) {
if (pPce->BackElementHeightInfo[el] == h) {
elIdx += 1;
chIdx += (pPce->BackElementIsCpe[el]) ? 2 : 1;
}
}
if (h == 0) { /* normal height */
elIdx += pPce->NumLfeChannelElements;
chIdx += pPce->NumLfeChannelElements;
}
}
chMapping[chIdx] = channelIdx;
chType[chIdx] = aChType;
chIndex[chIdx] = fc[heightLayer];
if (isCpe) {
chMapping[chIdx+1] = channelIdx+1;
chType[chIdx+1] = aChType;
chIndex[chIdx+1] = fc[heightLayer]+1;
}
*elMapping = elIdx;
return 1;
}
ec[heightLayer] += 1;
if (pPce->FrontElementIsCpe[i]) {
cc[heightLayer] += 2;
fc[heightLayer] += 2;
} else {
cc[heightLayer] += 1;
fc[heightLayer] += 1;
}
}
/* search in side channels */
for (i = 0; i < pPce->NumSideChannelElements; i++) {
int heightLayer = pPce->SideElementHeightInfo[i];
if (isCpe == pPce->SideElementIsCpe[i] && pPce->SideElementTagSelect[i] == tag) {
int h, elIdx = ec[heightLayer], chIdx = cc[heightLayer];
AUDIO_CHANNEL_TYPE aChType = (AUDIO_CHANNEL_TYPE)((heightLayer<<4) | ACT_SIDE);
for (h = heightLayer-1; h >= 0; h-=1) {
int el;
/* Count front channels/elements */
for (el = 0; el < pPce->NumFrontChannelElements; el+=1) {
if (pPce->FrontElementHeightInfo[el] == h) {
elIdx += 1;
chIdx += (pPce->FrontElementIsCpe[el]) ? 2 : 1;
}
}
/* Count side channels/elements */
for (el = 0; el < pPce->NumSideChannelElements; el+=1) {
if (pPce->SideElementHeightInfo[el] == h) {
elIdx += 1;
chIdx += (pPce->SideElementIsCpe[el]) ? 2 : 1;
}
}
/* Count back channels/elements */
for (el = 0; el < pPce->NumBackChannelElements; el+=1) {
if (pPce->BackElementHeightInfo[el] == h) {
elIdx += 1;
chIdx += (pPce->BackElementIsCpe[el]) ? 2 : 1;
}
}
if (h == 0) { /* LFE channels belong to the normal height layer */
elIdx += pPce->NumLfeChannelElements;
chIdx += pPce->NumLfeChannelElements;
}
}
chMapping[chIdx] = channelIdx;
chType[chIdx] = aChType;
chIndex[chIdx] = sc[heightLayer];
if (isCpe) {
chMapping[chIdx+1] = channelIdx+1;
chType[chIdx+1] = aChType;
chIndex[chIdx+1] = sc[heightLayer]+1;
}
*elMapping = elIdx;
return 1;
}
ec[heightLayer] += 1;
if (pPce->SideElementIsCpe[i]) {
cc[heightLayer] += 2;
sc[heightLayer] += 2;
} else {
cc[heightLayer] += 1;
sc[heightLayer] += 1;
}
}
/* search in back channels */
for (i = 0; i < pPce->NumBackChannelElements; i++) {
int heightLayer = pPce->BackElementHeightInfo[i];
if (isCpe == pPce->BackElementIsCpe[i] && pPce->BackElementTagSelect[i] == tag) {
int h, elIdx = ec[heightLayer], chIdx = cc[heightLayer];
AUDIO_CHANNEL_TYPE aChType = (AUDIO_CHANNEL_TYPE)((heightLayer<<4) | ACT_BACK);
for (h = heightLayer-1; h >= 0; h-=1) {
int el;
/* Count front channels/elements */
for (el = 0; el < pPce->NumFrontChannelElements; el+=1) {
if (pPce->FrontElementHeightInfo[el] == h) {
elIdx += 1;
chIdx += (pPce->FrontElementIsCpe[el]) ? 2 : 1;
}
}
/* Count side channels/elements */
for (el = 0; el < pPce->NumSideChannelElements; el+=1) {
if (pPce->SideElementHeightInfo[el] == h) {
elIdx += 1;
chIdx += (pPce->SideElementIsCpe[el]) ? 2 : 1;
}
}
/* Count back channels/elements */
for (el = 0; el < pPce->NumBackChannelElements; el+=1) {
if (pPce->BackElementHeightInfo[el] == h) {
elIdx += 1;
chIdx += (pPce->BackElementIsCpe[el]) ? 2 : 1;
}
}
if (h == 0) { /* normal height */
elIdx += pPce->NumLfeChannelElements;
chIdx += pPce->NumLfeChannelElements;
}
}
chMapping[chIdx] = channelIdx;
chType[chIdx] = aChType;
chIndex[chIdx] = bc[heightLayer];
if (isCpe) {
chMapping[chIdx+1] = channelIdx+1;
chType[chIdx+1] = aChType;
chIndex[chIdx+1] = bc[heightLayer]+1;
}
*elMapping = elIdx;
return 1;
}
ec[heightLayer] += 1;
if (pPce->BackElementIsCpe[i]) {
cc[heightLayer] += 2;
bc[heightLayer] += 2;
} else {
cc[heightLayer] += 1;
bc[heightLayer] += 1;
}
}
break;
case ID_LFE:
{ /* Unfortunately we have to go through all normal height
layer elements to get the position of the LFE channels.
Start with counting the front channels/elements at normal height */
for (i = 0; i < pPce->NumFrontChannelElements; i+=1) {
int heightLayer = pPce->FrontElementHeightInfo[i];
ec[heightLayer] += 1;
cc[heightLayer] += (pPce->FrontElementIsCpe[i]) ? 2 : 1;
}
/* Count side channels/elements at normal height */
for (i = 0; i < pPce->NumSideChannelElements; i+=1) {
int heightLayer = pPce->SideElementHeightInfo[i];
ec[heightLayer] += 1;
cc[heightLayer] += (pPce->SideElementIsCpe[i]) ? 2 : 1;
}
/* Count back channels/elements at normal height */
for (i = 0; i < pPce->NumBackChannelElements; i+=1) {
int heightLayer = pPce->BackElementHeightInfo[i];
ec[heightLayer] += 1;
cc[heightLayer] += (pPce->BackElementIsCpe[i]) ? 2 : 1;
}
/* search in lfe channels */
for (i = 0; i < pPce->NumLfeChannelElements; i++) {
int elIdx = ec[0]; /* LFE channels belong to the normal height layer */
int chIdx = cc[0];
if ( pPce->LfeElementTagSelect[i] == tag ) {
chMapping[chIdx] = channelIdx;
*elMapping = elIdx;
chType[chIdx] = ACT_LFE;
chIndex[chIdx] = lc;
return 1;
}
ec[0] += 1;
cc[0] += 1;
lc += 1;
}
} break;
/* Non audio elements */
case ID_CCE:
/* search in cce channels */
for (i = 0; i < pPce->NumValidCcElements; i++) {
if (pPce->ValidCcElementTagSelect[i] == tag) {
return 1;
}
}
break;
case ID_DSE:
/* search associated data elements */
for (i = 0; i < pPce->NumAssocDataElements; i++) {
if (pPce->AssocDataElementTagSelect[i] == tag) {
return 1;
}
}
break;
default:
return 0;
}
return 0; /* not found in any list */
}
#endif /* TP_PCE_ENABLE */
}
return 1;
}
int CProgramConfig_LookupElement(
CProgramConfig *pPce,
const UINT channelConfig,
const UINT tag,
const UINT channelIdx,
UCHAR chMapping[],
AUDIO_CHANNEL_TYPE chType[],
UCHAR chIndex[],
UCHAR *elMapping,
MP4_ELEMENT_ID elList[],
MP4_ELEMENT_ID elType
)
{
if (channelConfig > 0)
{
/* Constant channel mapping must have
been set during initialization. */
if ( elType == ID_SCE
|| elType == ID_CPE
|| elType == ID_LFE )
{
*elMapping = pPce->elCounter;
if (elList[pPce->elCounter] != elType) {
/* Not in the list */
return 0;
}
/* Assume all front channels */
getImplicitAudioChannelTypeAndIndex(&chType[channelIdx], &chIndex[channelIdx], channelConfig, channelIdx);
if (elType == ID_CPE) {
chType[channelIdx+1] = chType[channelIdx];
chIndex[channelIdx+1] = chIndex[channelIdx]+1;
}
pPce->elCounter++;
}
/* Accept all non-channel elements, too. */
return 1;
}
else
{
#ifdef TP_PCE_ENABLE
if (!pPce->isValid)
#endif /* TP_PCE_ENABLE */
{
/* Implicit channel mapping. */
if ( elType == ID_SCE
|| elType == ID_CPE
|| elType == ID_LFE )
{
/* Store all channel element IDs */
elList[pPce->elCounter] = elType;
*elMapping = pPce->elCounter++;
}
}
#ifdef TP_PCE_ENABLE
else {
/* Accept the additional channel(s), only if the tag is in the lists */
int isCpe = 0, i;
int cc = 0, fc = 0, sc = 0, bc = 0, lc = 0, ec = 0; /* Channel and element counters */
switch (elType)
{
case ID_CPE:
isCpe = 1;
case ID_SCE:
/* search in front channels */
for (i = 0; i < pPce->NumFrontChannelElements; i++) {
if (isCpe == pPce->FrontElementIsCpe[i] && pPce->FrontElementTagSelect[i] == tag) {
chMapping[cc] = channelIdx;
chType[cc] = ACT_FRONT;
chIndex[cc] = fc;
if (isCpe) {
chMapping[cc+1] = channelIdx+1;
chType[cc+1] = ACT_FRONT;
chIndex[cc+1] = fc+1;
}
*elMapping = ec;
return 1;
}
ec++;
if (pPce->FrontElementIsCpe[i]) {
cc+=2; fc+=2;
} else {
cc++; fc++;
}
}
/* search in side channels */
for (i = 0; i < pPce->NumSideChannelElements; i++) {
if (isCpe == pPce->SideElementIsCpe[i] && pPce->SideElementTagSelect[i] == tag) {
chMapping[cc] = channelIdx;
chType[cc] = ACT_SIDE;
chIndex[cc] = sc;
if (isCpe) {
chMapping[cc+1] = channelIdx+1;
chType[cc+1] = ACT_SIDE;
chIndex[cc+1] = sc+1;
}
*elMapping = ec;
return 1;
}
ec++;
if (pPce->SideElementIsCpe[i]) {
cc+=2; sc+=2;
} else {
cc++; sc++;
}
}
/* search in back channels */
for (i = 0; i < pPce->NumBackChannelElements; i++) {
if (isCpe == pPce->BackElementIsCpe[i] && pPce->BackElementTagSelect[i] == tag) {
chMapping[cc] = channelIdx;
chType[cc] = ACT_BACK;
chIndex[cc] = bc;
if (isCpe) {
chMapping[cc+1] = channelIdx+1;
chType[cc+1] = ACT_BACK;
chIndex[cc+1] = bc+1;
}
*elMapping = ec;
return 1;
}
ec++;
if (pPce->BackElementIsCpe[i]) {
cc+=2; bc+=2;
} else {
cc++; bc++;
}
}
break;
case ID_LFE:
/* Initialize channel counter and element counter */
cc = pPce->NumEffectiveChannels;
ec = pPce->NumFrontChannelElements+ pPce->NumSideChannelElements + pPce->NumBackChannelElements;
/* search in lfe channels */
for (i = 0; i < pPce->NumLfeChannelElements; i++) {
if ( pPce->LfeElementTagSelect[i] == tag ) {
chMapping[cc] = channelIdx;
*elMapping = ec;
chType[cc] = ACT_LFE;
chIndex[cc] = lc;
return 1;
}
ec++;
cc++;
lc++;
}
break;
/* Non audio elements */
case ID_CCE:
/* search in cce channels */
for (i = 0; i < pPce->NumValidCcElements; i++) {
if (pPce->ValidCcElementTagSelect[i] == tag) {
return 1;
}
}
break;
case ID_DSE:
/* search associated data elements */
for (i = 0; i < pPce->NumAssocDataElements; i++) {
if (pPce->AssocDataElementTagSelect[i] == tag) {
return 1;
}
}
break;
default:
return 0;
}
return 0; /* not found in any list */
}
#endif /* TP_PCE_ENABLE */
}
return 1;
}
