RawFrame *create_raw_frame_from_decklink(IDeckLinkVideoFrame *frame,
RawFrame::PixelFormat pf, bool rotate = false) {
void *dp;
RawFrame *ret = new RawFrame(
frame->GetWidth( ),
frame->GetHeight( ),
pf, frame->GetRowBytes( )
);
if (frame->GetBytes(&dp) != S_OK) {
throw std::runtime_error("Cannot get pointer to raw data");
}
if (rotate) {
flip_copy(ret, (uint8_t *) dp);
} else {
memcpy(ret->data( ), dp, ret->size( ));
}
return ret;
}
RawFrame *FreetypeFont::render_string(const char *string) {
int x;
RawFrame *ret;
FT_GlyphSlot slot = face->glyph;
FT_Bool use_kerning = FT_HAS_KERNING(face);
FT_UInt glyph_index, previous;
uint8_t *glyph_scanline;
x = 0;
previous = 0;
/* first compute the size of the resulting image */
const char *scan_ptr = string;
while (*scan_ptr != '\0') {
glyph_index = FT_Get_Char_Index(face, *scan_ptr);
scan_ptr++;
if (use_kerning && previous != 0 && glyph_index != 0) {
FT_Vector delta;
FT_Get_Kerning(face, previous, glyph_index,
FT_KERNING_DEFAULT, &delta);
x += delta.x / 64;
}
FTCHK(FT_Load_Glyph(face, glyph_index, FT_LOAD_DEFAULT));
x += slot->advance.x / 64;
previous = glyph_index;
}
/* initialize a raw frame */
ret = new RawFrame(x, _h, RawFrame::BGRAn8);
/* second pass: draw it */
scan_ptr = string;
int xd = 0;
previous = 0;
uint8_t *dest_scanline = ret->data( );
for (unsigned int i = 0; i < ret->size( ); i += 4) {
dest_scanline[i] = bb;
dest_scanline[i+1] = gb;
dest_scanline[i+2] = rb;
dest_scanline[i+3] = ab;
}
while (*scan_ptr != '\0') {
glyph_index = FT_Get_Char_Index(face, *scan_ptr);
scan_ptr++;
if (use_kerning && previous != 0 && glyph_index != 0) {
FT_Vector delta;
FT_Get_Kerning(face, previous, glyph_index,
FT_KERNING_DEFAULT, &delta);
xd += delta.x / 64;
}
FTCHK(FT_Load_Glyph(face, glyph_index, FT_LOAD_RENDER));
//int yd = -(slot->bitmap_top);
int yd = _baseline - slot->bitmap_top;
for (unsigned int y = 0; y < slot->bitmap.rows && yd < _h; y++, yd++) {
if (yd >= 0) {
glyph_scanline = ((uint8_t *)slot->bitmap.buffer)
+ slot->bitmap.pitch * y;
dest_scanline = ret->scanline(yd) + 4*xd;
int xd2 = xd;
for (unsigned int x = 0; x < slot->bitmap.width && xd2 < ret->w( );
x++, xd2++) {
dest_scanline[0] = (bf * glyph_scanline[x]
+ bb * (255 - glyph_scanline[x])) / 255;
dest_scanline[1] = (gf * glyph_scanline[x]
+ gb * (255 - glyph_scanline[x])) / 255;
dest_scanline[2] = (rf * glyph_scanline[x]
+ rb * (255 - glyph_scanline[x])) / 255;
dest_scanline[3] = (af * glyph_scanline[x]
+ ab * (255 - glyph_scanline[x])) / 255;
dest_scanline += 4;
}
}
}
xd += slot->advance.x / 64;
previous = glyph_index;
}
return ret;
}
int ReplayPlayoutLavfSource::run_lavc( ) {
AVPacket packet;
int frame_finished = 0;
int audio_finished = 0;
/*
* read stream until we get a video frame,
* possibly also decoding some audio along the way
*/
while (frame_finished == 0 && audio_finished == 0 &&
av_read_frame(format_ctx, &packet) >= 0) {
if (packet.stream_index == video_stream) {
avcodec_decode_video2(video_codecctx, lavc_frame,
&frame_finished, &packet);
} else if (packet.stream_index == audio_stream) {
avcodec_decode_audio4(audio_codecctx, audio_frame,
&audio_finished, &packet);
}
av_free_packet(&packet);
}
if (frame_finished) {
/* make a RawFrame out of lavc_frame */
RawFrame *fr = new RawFrame(1920, 1080, RawFrame::CbYCrY8422);
switch (lavc_frame->format) {
case AV_PIX_FMT_YUVJ422P:
case AV_PIX_FMT_YUV422P:
fr->pack->YCbCr8P422(
lavc_frame->data[0],
lavc_frame->data[1],
lavc_frame->data[2],
lavc_frame->linesize[0],
lavc_frame->linesize[1],
lavc_frame->linesize[2]
);
break;
case AV_PIX_FMT_UYVY422:
/* copy stuff */
memcpy(fr->data( ), lavc_frame->data[0], fr->size( ));
break;
case AV_PIX_FMT_YUV422P10LE:
fr->pack->YCbCr10P422(
(uint16_t *)lavc_frame->data[0],
(uint16_t *)lavc_frame->data[1],
(uint16_t *)lavc_frame->data[2],
lavc_frame->linesize[0] / 2,
lavc_frame->linesize[1] / 2,
lavc_frame->linesize[2] / 2
);
break;
case AV_PIX_FMT_YUV420P:
fr->pack->YCbCr8P420(
lavc_frame->data[0],
lavc_frame->data[1],
lavc_frame->data[2],
lavc_frame->linesize[0],
lavc_frame->linesize[1],
lavc_frame->linesize[2]
);
break;
default:
fprintf(stderr, "ReplayPlayoutLavfSource doesn't know how "
"to handle AVPixelFormat %d\n", lavc_frame->format);
memset(fr->data( ), 128, fr->size( ));
break;
}
pending_video_frames.push_back(fr);
return 1;
} else if (audio_finished) {
PackedAudioPacket<int16_t> apkt(
audio_frame->nb_samples,
audio_codecctx->channels
);
if (audio_codecctx->sample_fmt == AV_SAMPLE_FMT_S16) {
memcpy(apkt.data( ), audio_frame->data[0], apkt.size_bytes( ));
} else if (audio_codecctx->sample_fmt == AV_SAMPLE_FMT_FLTP) {
/* convert planar float (from AAC) to signed 16-bit */
copy_fltp(audio_frame, apkt);
} else {
fprintf(stderr, "sample_fmt=%d\n", audio_codecctx->sample_fmt);
throw std::runtime_error("don't understand sample format");
}
if (audio_codecctx->sample_rate != 48000) {
throw std::runtime_error("need 48khz");
}
if (audio_codecctx->channels != 2) {
/* mix down to 2 channels if needed */
PackedAudioPacket<int16_t> *twoch = apkt.change_channels(2);
pending_audio.add_packet(twoch);
delete twoch;
} else {
pending_audio.add_packet(&apkt);
}
return 1;
} else {
return 0;
}
}
