#include "ivi_common.h"
#include "indeo4data.h"
-#define IVI4_STREAM_ANALYSER 0
-#define IVI4_DEBUG_CHECKSUM 0
-
/**
* Indeo 4 frame types.
*/
#define IVI4_PIC_SIZE_ESC 7
-typedef struct {
- GetBitContext gb;
- AVFrame frame;
- RVMapDesc rvmap_tabs[9]; ///< local corrected copy of the static rvmap tables
-
- uint32_t frame_num;
- int frame_type;
- int prev_frame_type; ///< frame type of the previous frame
- uint32_t data_size; ///< size of the frame data in bytes from picture header
- int is_scalable;
- int transp_status; ///< transparency mode status: 1 - enabled
-
- IVIPicConfig pic_conf;
- IVIPlaneDesc planes[3]; ///< color planes
-
- int buf_switch; ///< used to switch between three buffers
- int dst_buf; ///< buffer index for the currently decoded frame
- int ref_buf; ///< inter frame reference buffer index
-
- IVIHuffTab mb_vlc; ///< current macroblock table descriptor
- IVIHuffTab blk_vlc; ///< current block table descriptor
-
- uint16_t checksum; ///< frame checksum
-
- uint8_t rvmap_sel;
- uint8_t in_imf;
- uint8_t in_q; ///< flag for explicitly stored quantiser delta
- uint8_t pic_glob_quant;
- uint8_t unknown1;
-
-#if IVI4_STREAM_ANALYSER
- uint8_t has_b_frames;
- uint8_t has_transp;
- uint8_t uses_tiling;
- uint8_t uses_haar;
- uint8_t uses_fullpel;
-#endif
-} IVI4DecContext;
-
-
static const struct {
InvTransformPtr *inv_trans;
DCTransformPtr *dc_trans;
* @param[in] avctx pointer to the AVCodecContext
* @return result code: 0 = OK, negative number = error
*/
-static int decode_pic_hdr(IVI4DecContext *ctx, AVCodecContext *avctx)
+static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
{
int pic_size_indx, i, p;
IVIPicConfig pic_conf;
* @param[in] avctx pointer to the AVCodecContext
* @return result code: 0 = OK, negative number = error
*/
-static int decode_band_hdr(IVI4DecContext *ctx, IVIBandDesc *band,
+static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
AVCodecContext *avctx)
{
int plane, band_num, indx, transform_id, scan_indx;
* @param[in] avctx pointer to the AVCodecContext
* @return result code: 0 = OK, negative number = error
*/
-static int decode_mb_info(IVI4DecContext *ctx, IVIBandDesc *band,
+static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
IVITile *tile, AVCodecContext *avctx)
{
int x, y, mv_x, mv_y, mv_delta, offs, mb_offset, blks_per_mb,
}
-/**
- * Decode an Indeo 4 band.
- *
- * @param[in,out] ctx pointer to the decoder context
- * @param[in,out] band pointer to the band descriptor
- * @param[in] avctx pointer to the AVCodecContext
- * @return result code: 0 = OK, negative number = error
- */
-static int decode_band(IVI4DecContext *ctx, int plane_num,
- IVIBandDesc *band, AVCodecContext *avctx)
-{
- int result, i, t, pos, idx1, idx2;
- IVITile *tile;
-
- band->buf = band->bufs[ctx->dst_buf];
- band->ref_buf = band->bufs[ctx->ref_buf];
-
- result = decode_band_hdr(ctx, band, avctx);
- if (result) {
- av_log(avctx, AV_LOG_ERROR, "Error decoding band header\n");
- return result;
- }
-
- if (band->is_empty) {
- av_log(avctx, AV_LOG_ERROR, "Empty band encountered!\n");
- return AVERROR_INVALIDDATA;
- }
-
- band->rv_map = &ctx->rvmap_tabs[band->rvmap_sel];
-
- /* apply corrections to the selected rvmap table if present */
- for (i = 0; i < band->num_corr; i++) {
- idx1 = band->corr[i * 2];
- idx2 = band->corr[i * 2 + 1];
- FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
- FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
- }
-
- pos = get_bits_count(&ctx->gb);
-
- for (t = 0; t < band->num_tiles; t++) {
- tile = &band->tiles[t];
-
- tile->is_empty = get_bits1(&ctx->gb);
- if (tile->is_empty) {
- ff_ivi_process_empty_tile(avctx, band, tile,
- (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3));
- av_dlog(avctx, "Empty tile encountered!\n");
- } else {
- tile->data_size = ff_ivi_dec_tile_data_size(&ctx->gb);
- if (!tile->data_size) {
- av_log(avctx, AV_LOG_ERROR, "Tile data size is zero!\n");
- return AVERROR_INVALIDDATA;
- }
-
- result = decode_mb_info(ctx, band, tile, avctx);
- if (result < 0)
- break;
-
- result = ff_ivi_decode_blocks(&ctx->gb, band, tile);
- if (result < 0 || ((get_bits_count(&ctx->gb) - pos) >> 3) != tile->data_size) {
- av_log(avctx, AV_LOG_ERROR, "Corrupted tile data encountered!\n");
- break;
- }
-
- pos += tile->data_size << 3; // skip to next tile
- }
- }
-
- /* restore the selected rvmap table by applying its corrections in reverse order */
- for (i = band->num_corr - 1; i >= 0; i--) {
- idx1 = band->corr[i * 2];
- idx2 = band->corr[i * 2 + 1];
- FFSWAP(uint8_t, band->rv_map->runtab[idx1], band->rv_map->runtab[idx2]);
- FFSWAP(int16_t, band->rv_map->valtab[idx1], band->rv_map->valtab[idx2]);
- }
-
-#if defined(DEBUG) && IVI4_DEBUG_CHECKSUM
- if (band->checksum_present) {
- uint16_t chksum = ivi_calc_band_checksum(band);
- if (chksum != band->checksum) {
- av_log(avctx, AV_LOG_ERROR,
- "Band checksum mismatch! Plane %d, band %d, received: %x, calculated: %x\n",
- band->plane, band->band_num, band->checksum, chksum);
- }
- }
-#endif
-
- align_get_bits(&ctx->gb);
-
- return 0;
-}
-
-
-static av_cold int decode_init(AVCodecContext *avctx)
-{
- IVI4DecContext *ctx = avctx->priv_data;
-
- ff_ivi_init_static_vlc();
-
- /* copy rvmap tables in our context so we can apply changes to them */
- memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
-
- /* Force allocation of the internal buffers */
- /* during picture header decoding. */
- ctx->pic_conf.pic_width = 0;
- ctx->pic_conf.pic_height = 0;
-
- avctx->pix_fmt = PIX_FMT_YUV410P;
-
- return 0;
-}
-
-
/**
* Rearrange decoding and reference buffers.
*
* @param[in,out] ctx pointer to the decoder context
*/
-static void switch_buffers(IVI4DecContext *ctx)
+static void switch_buffers(IVI45DecContext *ctx)
{
switch (ctx->prev_frame_type) {
case FRAMETYPE_INTRA:
}
-static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
- AVPacket *avpkt)
+static int is_nonnull_frame(IVI45DecContext *ctx)
{
- IVI4DecContext *ctx = avctx->priv_data;
- const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- int result, p, b;
-
- init_get_bits(&ctx->gb, buf, buf_size * 8);
-
- result = decode_pic_hdr(ctx, avctx);
- if (result) {
- av_log(avctx, AV_LOG_ERROR, "Error decoding picture header\n");
- return result;
- }
-
- switch_buffers(ctx);
-
- if (ctx->frame_type < FRAMETYPE_NULL_FIRST) {
- for (p = 0; p < 3; p++) {
- for (b = 0; b < ctx->planes[p].num_bands; b++) {
- result = decode_band(ctx, p, &ctx->planes[p].bands[b], avctx);
- if (result) {
- av_log(avctx, AV_LOG_ERROR,
- "Error decoding band: %d, plane: %d\n", b, p);
- return result;
- }
- }
- }
- }
-
- /* If the bidirectional mode is enabled, next I and the following P frame will */
- /* be sent together. Unfortunately the approach below seems to be the only way */
- /* to handle the B-frames mode. That's exactly the same Intel decoders do. */
- if (ctx->frame_type == FRAMETYPE_INTRA) {
- while (get_bits(&ctx->gb, 8)); // skip version string
- skip_bits_long(&ctx->gb, 64); // skip padding, TODO: implement correct 8-bytes alignment
- if (get_bits_left(&ctx->gb) > 18 && show_bits(&ctx->gb, 18) == 0x3FFF8)
- av_log(avctx, AV_LOG_ERROR, "Buffer contains IP frames!\n");
- }
-
- if (ctx->frame.data[0])
- avctx->release_buffer(avctx, &ctx->frame);
-
- ctx->frame.reference = 0;
- if ((result = avctx->get_buffer(avctx, &ctx->frame)) < 0) {
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return result;
- }
-
- if (ctx->is_scalable) {
- ff_ivi_recompose_haar(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0], 4);
- } else {
- ff_ivi_output_plane(&ctx->planes[0], ctx->frame.data[0], ctx->frame.linesize[0]);
- }
-
- ff_ivi_output_plane(&ctx->planes[2], ctx->frame.data[1], ctx->frame.linesize[1]);
- ff_ivi_output_plane(&ctx->planes[1], ctx->frame.data[2], ctx->frame.linesize[2]);
-
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = ctx->frame;
-
- return buf_size;
+ return ctx->frame_type < FRAMETYPE_NULL_FIRST;
}
-static av_cold int decode_close(AVCodecContext *avctx)
+static av_cold int decode_init(AVCodecContext *avctx)
{
- IVI4DecContext *ctx = avctx->priv_data;
+ IVI45DecContext *ctx = avctx->priv_data;
- ff_ivi_free_buffers(&ctx->planes[0]);
+ ff_ivi_init_static_vlc();
- if (ctx->frame.data[0])
- avctx->release_buffer(avctx, &ctx->frame);
+ /* copy rvmap tables in our context so we can apply changes to them */
+ memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
-#if IVI4_STREAM_ANALYSER
- if (ctx->is_scalable)
- av_log(avctx, AV_LOG_ERROR, "This video uses scalability mode!\n");
- if (ctx->uses_tiling)
- av_log(avctx, AV_LOG_ERROR, "This video uses local decoding!\n");
- if (ctx->has_b_frames)
- av_log(avctx, AV_LOG_ERROR, "This video contains B-frames!\n");
- if (ctx->has_transp)
- av_log(avctx, AV_LOG_ERROR, "Transparency mode is enabled!\n");
- if (ctx->uses_haar)
- av_log(avctx, AV_LOG_ERROR, "This video uses Haar transform!\n");
- if (ctx->uses_fullpel)
- av_log(avctx, AV_LOG_ERROR, "This video uses fullpel motion vectors!\n");
-#endif
+ /* Force allocation of the internal buffers */
+ /* during picture header decoding. */
+ ctx->pic_conf.pic_width = 0;
+ ctx->pic_conf.pic_height = 0;
+
+ avctx->pix_fmt = PIX_FMT_YUV410P;
+
+ ctx->decode_pic_hdr = decode_pic_hdr;
+ ctx->decode_band_hdr = decode_band_hdr;
+ ctx->decode_mb_info = decode_mb_info;
+ ctx->switch_buffers = switch_buffers;
+ ctx->is_nonnull_frame = is_nonnull_frame;
return 0;
}
.name = "indeo4",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_INDEO4,
- .priv_data_size = sizeof(IVI4DecContext),
+ .priv_data_size = sizeof(IVI45DecContext),
.init = decode_init,
- .close = decode_close,
- .decode = decode_frame,
+ .close = ff_ivi_decode_close,
+ .decode = ff_ivi_decode_frame,
.long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 4"),
};
projects / ffmpeg / blobdiff