static int gif_decode_frame(AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size)
{
GifState *s = avctx->priv_data;
AVFrame *picture = data;
int ret;
s->bytestream = buf;
s->bytestream_end = buf + buf_size;
if (gif_read_header1(s) < 0)
return -1;
avctx->pix_fmt = PIX_FMT_PAL8;
if (avcodec_check_dimensions(avctx, s->screen_width, s->screen_height))
return -1;
avcodec_set_dimensions(avctx, s->screen_width, s->screen_height);
if (s->picture.data[0])
avctx->release_buffer(avctx, &s->picture);
if (avctx->get_buffer(avctx, &s->picture) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
s->image_palette = (uint32_t *)s->picture.data[1];
ret = gif_parse_next_image(s);
if (ret < 0)
return ret;
*picture = s->picture;
*data_size = sizeof(AVPicture);
return s->bytestream - buf;
}
static int gif_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
GifState *s = avctx->priv_data;
AVFrame *picture = data;
int ret;
bytestream2_init(&s->gb, buf, buf_size);
if ((ret = gif_read_header1(s)) < 0)
return ret;
avctx->pix_fmt = AV_PIX_FMT_PAL8;
if ((ret = ff_set_dimensions(avctx, s->screen_width, s->screen_height)) < 0)
return ret;
if ((ret = ff_get_buffer(avctx, picture, 0)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
s->image_palette = (uint32_t *)picture->data[1];
ret = gif_parse_next_image(s, picture);
if (ret < 0)
return ret;
*got_frame = 1;
return bytestream2_tell(&s->gb);
}
static int gif_decode_frame(AVCodecContext *avctx, void *data, int *got_picture, AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
GifState *s = avctx->priv_data;
AVFrame *picture = data;
int ret;
s->picture.pts = avpkt->pts;
s->picture.pkt_pts = avpkt->pts;
s->picture.pkt_dts = avpkt->dts;
s->picture.pkt_duration = avpkt->duration;
s->bytestream = buf;
s->bytestream_end = buf + buf_size;
if (buf_size >= 6) {
s->keyframe = memcmp(s->bytestream, gif87a_sig, 6) == 0 ||
memcmp(s->bytestream, gif89a_sig, 6) == 0;
} else {
s->keyframe = 0;
}
if (s->keyframe) {
if ((ret = gif_read_header1(s)) < 0)
return ret;
if ((ret = av_image_check_size(s->screen_width, s->screen_height, 0, avctx)) < 0)
return ret;
avcodec_set_dimensions(avctx, s->screen_width, s->screen_height);
if (s->picture.data[0])
avctx->release_buffer(avctx, &s->picture);
if ((ret = avctx->get_buffer(avctx, &s->picture)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
s->picture.pict_type = AV_PICTURE_TYPE_I;
s->picture.key_frame = 1;
} else {
if ((ret = avctx->reget_buffer(avctx, &s->picture)) < 0) {
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
return ret;
}
s->picture.pict_type = AV_PICTURE_TYPE_P;
s->picture.key_frame = 0;
}
ret = gif_parse_next_image(s, got_picture);
if (ret < 0)
return ret;
else if (*got_picture)
*picture = s->picture;
return s->bytestream - buf;
}
static int gif_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
{
GifState *s = avctx->priv_data;
int ret;
bytestream2_init(&s->gb, avpkt->data, avpkt->size);
s->frame->pts = avpkt->pts;
s->frame->pkt_pts = avpkt->pts;
s->frame->pkt_dts = avpkt->dts;
av_frame_set_pkt_duration(s->frame, avpkt->duration);
if (avpkt->size >= 6) {
s->keyframe = memcmp(avpkt->data, gif87a_sig, 6) == 0 ||
memcmp(avpkt->data, gif89a_sig, 6) == 0;
} else {
s->keyframe = 0;
}
if (s->keyframe) {
s->keyframe_ok = 0;
s->gce_prev_disposal = GCE_DISPOSAL_NONE;
if ((ret = gif_read_header1(s)) < 0)
return ret;
if ((ret = ff_set_dimensions(avctx, s->screen_width, s->screen_height)) < 0)
return ret;
av_frame_unref(s->frame);
if ((ret = ff_get_buffer(avctx, s->frame, 0)) < 0)
return ret;
av_fast_malloc(&s->idx_line, &s->idx_line_size, s->screen_width);
if (!s->idx_line)
return AVERROR(ENOMEM);
s->frame->pict_type = AV_PICTURE_TYPE_I;
s->frame->key_frame = 1;
s->keyframe_ok = 1;
} else {
if (!s->keyframe_ok) {
av_log(avctx, AV_LOG_ERROR, "cannot decode frame without keyframe\n");
return AVERROR_INVALIDDATA;
}
if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
return ret;
s->frame->pict_type = AV_PICTURE_TYPE_P;
s->frame->key_frame = 0;
}
ret = gif_parse_next_image(s, s->frame);
if (ret < 0)
return ret;
if ((ret = av_frame_ref(data, s->frame)) < 0)
return ret;
*got_frame = 1;
return bytestream2_tell(&s->gb);
}
static int gif_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
{
GifState *s = avctx->priv_data;
AVFrame *picture = data;
int ret;
bytestream2_init(&s->gb, avpkt->data, avpkt->size);
s->picture.pts = avpkt->pts;
s->picture.pkt_pts = avpkt->pts;
s->picture.pkt_dts = avpkt->dts;
s->picture.pkt_duration = avpkt->duration;
if (avpkt->size >= 6) {
s->keyframe = memcmp(avpkt->data, gif87a_sig, 6) == 0 ||
memcmp(avpkt->data, gif89a_sig, 6) == 0;
} else {
s->keyframe = 0;
}
if (s->keyframe) {
s->keyframe_ok = 0;
if ((ret = gif_read_header1(s)) < 0)
return ret;
if ((ret = av_image_check_size(s->screen_width, s->screen_height, 0, avctx)) < 0)
return ret;
avcodec_set_dimensions(avctx, s->screen_width, s->screen_height);
if (s->picture.data[0])
avctx->release_buffer(avctx, &s->picture);
if ((ret = ff_get_buffer(avctx, &s->picture)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
s->picture.pict_type = AV_PICTURE_TYPE_I;
s->picture.key_frame = 1;
s->keyframe_ok = 1;
} else {
if (!s->keyframe_ok) {
av_log(avctx, AV_LOG_ERROR, "cannot decode frame without keyframe\n");
return AVERROR_INVALIDDATA;
}
if ((ret = avctx->reget_buffer(avctx, &s->picture)) < 0) {
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
return ret;
}
s->picture.pict_type = AV_PICTURE_TYPE_P;
s->picture.key_frame = 0;
}
ret = gif_parse_next_image(s, got_frame);
if (ret < 0)
return ret;
else if (*got_frame)
*picture = s->picture;
return avpkt->size;
}
