static av_cold int ass_decode_init(AVCodecContext *avctx)
{
avctx->subtitle_header = av_malloc(avctx->extradata_size);
if (!avctx->extradata)
return AVERROR(ENOMEM);
memcpy(avctx->subtitle_header, avctx->extradata, avctx->extradata_size);
avctx->subtitle_header_size = avctx->extradata_size;
avctx->priv_data = ff_ass_split(avctx->extradata);
return 0;
}
static av_cold int mov_text_encode_init(AVCodecContext *avctx)
{
/*
* For now, we'll use a fixed default style. When we add styling
* support, this will be generated from the ASS style.
*/
static const uint8_t text_sample_entry[] = {
0x00, 0x00, 0x00, 0x00, // uint32_t displayFlags
0x01, // int8_t horizontal-justification
0xFF, // int8_t vertical-justification
0x00, 0x00, 0x00, 0x00, // uint8_t background-color-rgba[4]
// BoxRecord {
0x00, 0x00, // int16_t top
0x00, 0x00, // int16_t left
0x00, 0x00, // int16_t bottom
0x00, 0x00, // int16_t right
// };
// StyleRecord {
0x00, 0x00, // uint16_t startChar
0x00, 0x00, // uint16_t endChar
0x00, 0x01, // uint16_t font-ID
0x00, // uint8_t face-style-flags
0x12, // uint8_t font-size
0xFF, 0xFF, 0xFF, 0xFF, // uint8_t text-color-rgba[4]
// };
// FontTableBox {
0x00, 0x00, 0x00, 0x12, // uint32_t size
'f', 't', 'a', 'b', // uint8_t name[4]
0x00, 0x01, // uint16_t entry-count
// FontRecord {
0x00, 0x01, // uint16_t font-ID
0x05, // uint8_t font-name-length
'S', 'e', 'r', 'i', 'f',// uint8_t font[font-name-length]
// };
// };
};
MovTextContext *s = avctx->priv_data;
avctx->extradata_size = sizeof text_sample_entry;
avctx->extradata = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
if (!avctx->extradata)
return AVERROR(ENOMEM);
av_bprint_init(&s->buffer, 0, AV_BPRINT_SIZE_UNLIMITED);
memcpy(avctx->extradata, text_sample_entry, avctx->extradata_size);
s->ass_ctx = ff_ass_split(avctx->subtitle_header);
return s->ass_ctx ? 0 : AVERROR_INVALIDDATA;
}
