static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) { AnsiContext *s = avctx->priv_data; uint8_t *buf = avpkt->data; int buf_size = avpkt->size; const uint8_t *buf_end = buf+buf_size; int ret, i, count; if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) return ret; if (!avctx->frame_number) { for (i=0; i<avctx->height; i++) memset(s->frame->data[0]+ i*s->frame->linesize[0], 0, avctx->width); memset(s->frame->data[1], 0, AVPALETTE_SIZE); } s->frame->pict_type = AV_PICTURE_TYPE_I; s->frame->palette_has_changed = 1; set_palette((uint32_t *)s->frame->data[1]); if (!s->first_frame) { erase_screen(avctx); s->first_frame = 1; } while(buf < buf_end) { switch(s->state) { case STATE_NORMAL: switch (buf[0]) { case 0x00: //NUL case 0x07: //BEL case 0x1A: //SUB /* ignore */ break; case 0x08: //BS s->x = FFMAX(s->x - 1, 0); break; case 0x09: //HT i = s->x / FONT_WIDTH; count = ((i + 8) & ~7) - i; for (i = 0; i < count; i++) draw_char(avctx, ' '); break; case 0x0A: //LF hscroll(avctx); case 0x0D: //CR s->x = 0; break; case 0x0C: //FF erase_screen(avctx); break; case 0x1B: //ESC s->state = STATE_ESCAPE; break; default: draw_char(avctx, buf[0]); } break; case STATE_ESCAPE: if (buf[0] == '[') { s->state = STATE_CODE; s->nb_args = 0; s->args[0] = -1; } else { s->state = STATE_NORMAL; draw_char(avctx, 0x1B); continue; } break; case STATE_CODE: switch(buf[0]) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': if (s->nb_args < MAX_NB_ARGS) s->args[s->nb_args] = FFMAX(s->args[s->nb_args], 0) * 10 + buf[0] - '0'; break; case ';': s->nb_args++; if (s->nb_args < MAX_NB_ARGS) s->args[s->nb_args] = 0; break; case 'M': s->state = STATE_MUSIC_PREAMBLE; break; case '=': case '?': /* ignore */ break; default: if (s->nb_args > MAX_NB_ARGS) av_log(avctx, AV_LOG_WARNING, "args overflow (%i)\n", s->nb_args); if (s->nb_args < MAX_NB_ARGS && s->args[s->nb_args] >= 0) s->nb_args++; if ((ret = execute_code(avctx, buf[0])) < 0) return ret; s->state = STATE_NORMAL; } break; case STATE_MUSIC_PREAMBLE: if (buf[0] == 0x0E || buf[0] == 0x1B) s->state = STATE_NORMAL; /* ignore music data */ break; } buf++; } *got_frame = 1; if ((ret = av_frame_ref(data, s->frame)) < 0) return ret; return buf_size; }
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) { AnsiContext *s = avctx->priv_data; uint8_t *buf = avpkt->data; int buf_size = avpkt->size; const uint8_t *buf_end = buf+buf_size; int ret, i, count; if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) return ret; if (!avctx->frame_number) { for (i=0; i<avctx->height; i++) memset(s->frame->data[0]+ i*s->frame->linesize[0], 0, avctx->width); memset(s->frame->data[1], 0, AVPALETTE_SIZE); } s->frame->pict_type = AV_PICTURE_TYPE_I; s->frame->palette_has_changed = 1; set_palette((uint32_t *)s->frame->data[1]); if (!s->first_frame) { erase_screen(avctx); s->first_frame = 1; } while(buf < buf_end) { switch(s->state) { case STATE_NORMAL: switch (buf[0]) { case 0x00:  