Merge commit '253d0be6a1ecc343d29ff8e1df0ddf961ab9c772'
* commit '253d0be6a1ecc343d29ff8e1df0ddf961ab9c772': pgssubdec: handle more complex PGS scenarios Conflicts: libavcodec/pgssubdec.c Some of this has been split out and commited in cleanly split patches immedeately before this merge Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
commit
ae9a73de2a
@ -34,6 +34,9 @@
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#include "libavutil/opt.h"
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#define RGBA(r,g,b,a) (((a) << 24) | ((r) << 16) | ((g) << 8) | (b))
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#define MAX_EPOCH_PALETTES 8 // Max 8 allowed per PGS epoch
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#define MAX_EPOCH_OBJECTS 64 // Max 64 allowed per PGS epoch
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#define MAX_OBJECT_REFS 2 // Max objects per display set
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enum SegmentType {
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PALETTE_SEGMENT = 0x14,
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@ -43,48 +46,92 @@ enum SegmentType {
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DISPLAY_SEGMENT = 0x80,
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};
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typedef struct PGSSubPictureReference {
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int x;
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int y;
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int picture_id;
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int composition;
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} PGSSubPictureReference;
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typedef struct PGSSubObjectRef {
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int id;
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int window_id;
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uint8_t composition_flag;
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int x;
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int y;
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int crop_x;
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int crop_y;
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int crop_w;
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int crop_h;
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} PGSSubObjectRef;
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typedef struct PGSSubPresentation {
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int id_number;
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int object_count;
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PGSSubPictureReference *objects;
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int id_number;
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int palette_id;
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int object_count;
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PGSSubObjectRef objects[MAX_OBJECT_REFS];
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int64_t pts;
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} PGSSubPresentation;
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typedef struct PGSSubPicture {
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typedef struct PGSSubObject {
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int id;
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int w;
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int h;
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uint8_t *rle;
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unsigned int rle_buffer_size, rle_data_len;
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unsigned int rle_remaining_len;
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} PGSSubPicture;
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} PGSSubObject;
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typedef struct PGSSubObjects {
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int count;
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PGSSubObject object[MAX_EPOCH_OBJECTS];
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} PGSSubObjects;
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typedef struct PGSSubPalette {
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int id;
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uint32_t clut[256];
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} PGSSubPalette;
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typedef struct PGSSubPalettes {
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int count;
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PGSSubPalette palette[MAX_EPOCH_PALETTES];
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} PGSSubPalettes;
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typedef struct PGSSubContext {
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AVClass *class;
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PGSSubPresentation presentation;
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uint32_t clut[256];
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PGSSubPicture pictures[UINT16_MAX];
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PGSSubPalettes palettes;
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PGSSubObjects objects;
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int forced_subs_only;
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} PGSSubContext;
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static void flush_cache(AVCodecContext *avctx)
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{
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PGSSubContext *ctx = avctx->priv_data;
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uint16_t picture;
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int i;
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av_freep(&ctx->presentation.objects);
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ctx->presentation.object_count = 0;
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for (picture = 0; picture < UINT16_MAX; ++picture) {
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av_freep(&ctx->pictures[picture].rle);
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ctx->pictures[picture].rle_buffer_size = 0;
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for (i = 0; i < ctx->objects.count; i++) {
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av_freep(&ctx->objects.object[i].rle);
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ctx->objects.object[i].rle_buffer_size = 0;
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ctx->objects.object[i].rle_remaining_len = 0;
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}
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ctx->objects.count = 0;
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ctx->palettes.count = 0;
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}
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static PGSSubObject * find_object(int id, PGSSubObjects *objects)
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{
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int i;
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for (i = 0; i < objects->count; i++) {
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if (objects->object[i].id == id)
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return &objects->object[i];
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}
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return NULL;
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}
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static PGSSubPalette * find_palette(int id, PGSSubPalettes *palettes)
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{
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int i;
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for (i = 0; i < palettes->count; i++) {
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if (palettes->palette[i].id == id)
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return &palettes->palette[i];
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}
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return NULL;
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}
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static av_cold int init_decoder(AVCodecContext *avctx)
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@ -180,37 +227,46 @@ static int decode_rle(AVCodecContext *avctx, AVSubtitleRect *rect,
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* @param avctx contains the current codec context
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* @param buf pointer to the packet to process
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* @param buf_size size of packet to process
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* @todo TODO: Enable support for RLE data over multiple packets
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*/
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static int parse_picture_segment(AVCodecContext *avctx,
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static int parse_object_segment(AVCodecContext *avctx,
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const uint8_t *buf, int buf_size)
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{
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PGSSubContext *ctx = avctx->priv_data;
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PGSSubObject *object;
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uint8_t sequence_desc;
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unsigned int rle_bitmap_len, width, height;
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uint16_t picture_id;
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int id;
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if (buf_size <= 4)
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return AVERROR_INVALIDDATA;
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buf_size -= 4;
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picture_id = bytestream_get_be16(&buf);
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id = bytestream_get_be16(&buf);
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object = find_object(id, &ctx->objects);
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if (!object) {
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if (ctx->objects.count >= MAX_EPOCH_OBJECTS) {
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av_log(avctx, AV_LOG_ERROR, "Too many objects in epoch\n");
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return AVERROR_INVALIDDATA;
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}
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object = &ctx->objects.object[ctx->objects.count++];
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object->id = id;
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}
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/* skip 1 unknown byte: Version Number */
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buf++;
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/* skip object version number */
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buf += 1;
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/* Read the Sequence Description to determine if start of RLE data or appended to previous RLE */
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sequence_desc = bytestream_get_byte(&buf);
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if (!(sequence_desc & 0x80)) {
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/* Additional RLE data */
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if (buf_size > ctx->pictures[picture_id].rle_remaining_len)
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if (buf_size > object->rle_remaining_len)
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return AVERROR_INVALIDDATA;
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memcpy(ctx->pictures[picture_id].rle + ctx->pictures[picture_id].rle_data_len, buf, buf_size);
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ctx->pictures[picture_id].rle_data_len += buf_size;
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ctx->pictures[picture_id].rle_remaining_len -= buf_size;
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memcpy(object->rle + object->rle_data_len, buf, buf_size);
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object->rle_data_len += buf_size;
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object->rle_remaining_len -= buf_size;
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return 0;
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}
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@ -237,17 +293,17 @@ static int parse_picture_segment(AVCodecContext *avctx,
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return AVERROR_INVALIDDATA;
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}
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ctx->pictures[picture_id].w = width;
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ctx->pictures[picture_id].h = height;
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object->w = width;
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object->h = height;
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av_fast_padded_malloc(&ctx->pictures[picture_id].rle, &ctx->pictures[picture_id].rle_buffer_size, rle_bitmap_len);
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av_fast_padded_malloc(&object->rle, &object->rle_buffer_size, rle_bitmap_len);
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if (!ctx->pictures[picture_id].rle)
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if (!object->rle)
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return AVERROR(ENOMEM);
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memcpy(ctx->pictures[picture_id].rle, buf, buf_size);
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ctx->pictures[picture_id].rle_data_len = buf_size;
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ctx->pictures[picture_id].rle_remaining_len = rle_bitmap_len - buf_size;
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memcpy(object->rle, buf, buf_size);
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object->rle_data_len = buf_size;
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object->rle_remaining_len = rle_bitmap_len - buf_size;
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return 0;
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}
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@ -266,15 +322,28 @@ static int parse_palette_segment(AVCodecContext *avctx,
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const uint8_t *buf, int buf_size)
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{
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PGSSubContext *ctx = avctx->priv_data;
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PGSSubPalette *palette;
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const uint8_t *buf_end = buf + buf_size;
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const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
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int color_id;
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int y, cb, cr, alpha;
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int r, g, b, r_add, g_add, b_add;
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int id;
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/* Skip two null bytes */
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buf += 2;
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id = bytestream_get_byte(&buf);
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palette = find_palette(id, &ctx->palettes);
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if (!palette) {
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if (ctx->palettes.count >= MAX_EPOCH_PALETTES) {
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av_log(avctx, AV_LOG_ERROR, "Too many palettes in epoch\n");
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return AVERROR_INVALIDDATA;
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}
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palette = &ctx->palettes.palette[ctx->palettes.count++];
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palette->id = id;
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}
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/* Skip palette version */
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buf += 1;
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while (buf < buf_end) {
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color_id = bytestream_get_byte(&buf);
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@ -289,7 +358,7 @@ static int parse_palette_segment(AVCodecContext *avctx,
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av_dlog(avctx, "Color %d := (%d,%d,%d,%d)\n", color_id, r, g, b, alpha);
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/* Store color in palette */
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ctx->clut[color_id] = RGBA(r,g,b,alpha);
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palette->clut[color_id] = RGBA(r,g,b,alpha);
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}
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return 0;
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}
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@ -310,8 +379,9 @@ static int parse_presentation_segment(AVCodecContext *avctx,
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int64_t pts)
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{
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PGSSubContext *ctx = avctx->priv_data;
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int ret;
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int i, state, ret;
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// Video descriptor
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int w = bytestream_get_be16(&buf);
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int h = bytestream_get_be16(&buf);
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@ -325,57 +395,73 @@ static int parse_presentation_segment(AVCodecContext *avctx,
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if (ret < 0)
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return ret;
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/* Skip 1 bytes of unknown, frame rate? */
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/* Skip 1 bytes of unknown, frame rate */
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buf++;
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// Composition descriptor
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ctx->presentation.id_number = bytestream_get_be16(&buf);
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/*
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* state is a 2 bit field that defines pgs epoch boundaries
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* 00 - Normal, previously defined objects and palettes are still valid
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* 01 - Acquisition point, previous objects and palettes can be released
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* 10 - Epoch start, previous objects and palettes can be released
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* 11 - Epoch continue, previous objects and palettes can be released
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*
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* reserved 6 bits discarded
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*/
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state = bytestream_get_byte(&buf) >> 6;
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if (state != 0) {
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flush_cache(avctx);
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}
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/*
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* Skip 3 bytes of unknown:
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* state
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* palette_update_flag (0x80),
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* palette_id_to_use,
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* skip palette_update_flag (0x80),
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*/
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buf += 3;
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buf += 1;
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ctx->presentation.palette_id = bytestream_get_byte(&buf);
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ctx->presentation.object_count = bytestream_get_byte(&buf);
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if (!ctx->presentation.object_count)
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return 0;
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/* Verify that enough bytes are remaining for all of the objects. */
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buf_size -= 11;
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if (buf_size < ctx->presentation.object_count * 8) {
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ctx->presentation.object_count = 0;
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return AVERROR_INVALIDDATA;
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if (ctx->presentation.object_count > MAX_OBJECT_REFS) {
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av_log(avctx, AV_LOG_ERROR,
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"Invalid number of presentation objects %d\n",
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ctx->presentation.object_count);
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ctx->presentation.object_count = 2;
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if (avctx->err_recognition & AV_EF_EXPLODE) {
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return AVERROR_INVALIDDATA;
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}
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}
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av_freep(&ctx->presentation.objects);
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ctx->presentation.objects = av_malloc_array(ctx->presentation.object_count, sizeof(PGSSubPictureReference));
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if (!ctx->presentation.objects) {
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ctx->presentation.object_count = 0;
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return AVERROR(ENOMEM);
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}
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for (object_index = 0; object_index < ctx->presentation.object_count; ++object_index) {
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PGSSubPictureReference *reference = &ctx->presentation.objects[object_index];
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reference->picture_id = bytestream_get_be16(&buf);
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for (i = 0; i < ctx->presentation.object_count; i++)
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{
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ctx->presentation.objects[i].id = bytestream_get_be16(&buf);
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ctx->presentation.objects[i].window_id = bytestream_get_byte(&buf);
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ctx->presentation.objects[i].composition_flag = bytestream_get_byte(&buf);
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/* Skip window_id_ref */
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buf++;
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/* composition_flag (0x80 - object cropped, 0x40 - object forced) */
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reference->composition = bytestream_get_byte(&buf);
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ctx->presentation.objects[i].x = bytestream_get_be16(&buf);
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ctx->presentation.objects[i].y = bytestream_get_be16(&buf);
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reference->x = bytestream_get_be16(&buf);
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reference->y = bytestream_get_be16(&buf);
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// If cropping
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if (ctx->presentation.objects[i].composition_flag & 0x80) {
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ctx->presentation.objects[i].crop_x = bytestream_get_be16(&buf);
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ctx->presentation.objects[i].crop_y = bytestream_get_be16(&buf);
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ctx->presentation.objects[i].crop_w = bytestream_get_be16(&buf);
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ctx->presentation.objects[i].crop_h = bytestream_get_be16(&buf);
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}
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/* TODO If cropping, cropping_x, cropping_y, cropping_width, cropping_height (all 2 bytes).*/
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av_dlog(avctx, "Subtitle Placement ID=%d, x=%d, y=%d\n", reference->picture_id, reference->x, reference->y);
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av_dlog(avctx, "Subtitle Placement x=%d, y=%d\n",
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ctx->presentation.objects[i].x, ctx->presentation.objects[i].y);
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if (reference->x > avctx->width || reference->y > avctx->height) {
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if (ctx->presentation.objects[i].x > avctx->width ||
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ctx->presentation.objects[i].y > avctx->height) {
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av_log(avctx, AV_LOG_ERROR, "Subtitle out of video bounds. x = %d, y = %d, video width = %d, video height = %d.\n",
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reference->x, reference->y, avctx->width, avctx->height);
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reference->x = 0;
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reference->y = 0;
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ctx->presentation.objects[i].x,
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ctx->presentation.objects[i].y,
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avctx->width, avctx->height);
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ctx->presentation.objects[i].x = 0;
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ctx->presentation.objects[i].y = 0;
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if (avctx->err_recognition & AV_EF_EXPLODE) {
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return AVERROR_INVALIDDATA;
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}
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}
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}
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@ -391,11 +477,6 @@ static int parse_presentation_segment(AVCodecContext *avctx,
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* @param data pointer to the data pertaining the subtitle to display
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* @param buf pointer to the packet to process
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* @param buf_size size of packet to process
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* @todo TODO: Fix start time, relies on correct PTS, currently too late
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*
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* @todo TODO: Fix end time, normally cleared by a second display
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* @todo segment, which is currently ignored as it clears
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* @todo the subtitle too early.
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*/
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static int display_end_segment(AVCodecContext *avctx, void *data,
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const uint8_t *buf, int buf_size)
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@ -403,24 +484,13 @@ static int display_end_segment(AVCodecContext *avctx, void *data,
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AVSubtitle *sub = data;
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PGSSubContext *ctx = avctx->priv_data;
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int64_t pts;
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uint16_t rect;
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/*
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* The end display time is a timeout value and is only reached
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* if the next subtitle is later than timeout or subtitle has
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* not been cleared by a subsequent empty display command.
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*/
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PGSSubPalette *palette;
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int i, ret;
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pts = ctx->presentation.pts != AV_NOPTS_VALUE ? ctx->presentation.pts : sub->pts;
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memset(sub, 0, sizeof(*sub));
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sub->pts = pts;
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ctx->presentation.pts = AV_NOPTS_VALUE;
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// Blank if last object_count was 0.
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if (!ctx->presentation.object_count)
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return 1;
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sub->start_display_time = 0;
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// There is no explicit end time for PGS subtitles. The end time
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// is defined by the start of the next sub which may contain no
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@ -428,39 +498,88 @@ static int display_end_segment(AVCodecContext *avctx, void *data,
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sub->end_display_time = UINT32_MAX;
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sub->format = 0;
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sub->num_rects = ctx->presentation.object_count;
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sub->rects = av_mallocz_array(sub->num_rects, sizeof(*sub->rects));
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// Blank if last object_count was 0.
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if (!ctx->presentation.object_count)
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return 1;
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sub->rects = av_mallocz(sizeof(*sub->rects) * ctx->presentation.object_count);
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if (!sub->rects) {
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return AVERROR(ENOMEM);
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}
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palette = find_palette(ctx->presentation.palette_id, &ctx->palettes);
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if (!palette) {
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// Missing palette. Should only happen with damaged streams.
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av_log(avctx, AV_LOG_ERROR, "Invalid palette id %d\n",
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ctx->presentation.palette_id);
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avsubtitle_free(sub);
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return AVERROR_INVALIDDATA;
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}
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for (i = 0; i < ctx->presentation.object_count; i++) {
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PGSSubObject *object;
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for (rect = 0; rect < sub->num_rects; ++rect) {
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uint16_t picture_id = ctx->presentation.objects[rect].picture_id;
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sub->rects[rect] = av_mallocz(sizeof(*sub->rects[rect]));
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sub->rects[rect]->x = ctx->presentation.objects[rect].x;
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sub->rects[rect]->y = ctx->presentation.objects[rect].y;
|
||||
sub->rects[rect]->w = ctx->pictures[picture_id].w;
|
||||
sub->rects[rect]->h = ctx->pictures[picture_id].h;
|
||||
sub->rects[rect]->type = SUBTITLE_BITMAP;
|
||||
sub->rects[i] = av_mallocz(sizeof(*sub->rects[0]));
|
||||
if (!sub->rects[i]) {
|
||||
avsubtitle_free(sub);
|
||||
return AVERROR(ENOMEM);
|
||||
}
|
||||
sub->num_rects++;
|
||||
sub->rects[i]->type = SUBTITLE_BITMAP;
|
||||
|
||||
/* Process bitmap */
|
||||
sub->rects[rect]->pict.linesize[0] = ctx->pictures[picture_id].w;
|
||||
if (ctx->pictures[picture_id].rle) {
|
||||
if (ctx->pictures[picture_id].rle_remaining_len)
|
||||
object = find_object(ctx->presentation.objects[i].id, &ctx->objects);
|
||||
if (!object) {
|
||||
// Missing object. Should only happen with damaged streams.
|
||||
av_log(avctx, AV_LOG_ERROR, "Invalid object id %d\n",
|
||||
ctx->presentation.objects[i].id);
|
||||
if (avctx->err_recognition & AV_EF_EXPLODE) {
|
||||
avsubtitle_free(sub);
|
||||
return AVERROR_INVALIDDATA;
|
||||
}
|
||||
// Leaves rect empty with 0 width and height.
|
||||
continue;
|
||||
}
|
||||
if (ctx->presentation.objects[i].composition_flag & 0x40)
|
||||
sub->rects[i]->flags |= AV_SUBTITLE_FLAG_FORCED;
|
||||
|
||||
sub->rects[i]->x = ctx->presentation.objects[i].x;
|
||||
sub->rects[i]->y = ctx->presentation.objects[i].y;
|
||||
sub->rects[i]->w = object->w;
|
||||
sub->rects[i]->h = object->h;
|
||||
|
||||
sub->rects[i]->pict.linesize[0] = object->w;
|
||||
|
||||
if (object->rle) {
|
||||
if (object->rle_remaining_len) {
|
||||
av_log(avctx, AV_LOG_ERROR, "RLE data length %u is %u bytes shorter than expected\n",
|
||||
ctx->pictures[picture_id].rle_data_len, ctx->pictures[picture_id].rle_remaining_len);
|
||||
if (decode_rle(avctx, sub->rects[rect], ctx->pictures[picture_id].rle, ctx->pictures[picture_id].rle_data_len) < 0)
|
||||
return 0;
|
||||
object->rle_data_len, object->rle_remaining_len);
|
||||
if (avctx->err_recognition & AV_EF_EXPLODE) {
|
||||
avsubtitle_free(sub);
|
||||
return AVERROR_INVALIDDATA;
|
||||
}
|
||||
}
|
||||
ret = decode_rle(avctx, sub->rects[i], object->rle, object->rle_data_len);
|
||||
if (ret < 0) {
|
||||
if ((avctx->err_recognition & AV_EF_EXPLODE) ||
|
||||
ret == AVERROR(ENOMEM)) {
|
||||
avsubtitle_free(sub);
|
||||
return ret;
|
||||
}
|
||||
sub->rects[i]->w = 0;
|
||||
sub->rects[i]->h = 0;
|
||||
continue;
|
||||
}
|
||||
}
|
||||
/* Allocate memory for colors */
|
||||
sub->rects[i]->nb_colors = 256;
|
||||
sub->rects[i]->pict.data[1] = av_mallocz(AVPALETTE_SIZE);
|
||||
if (!sub->rects[i]->pict.data[1]) {
|
||||
avsubtitle_free(sub);
|
||||
return AVERROR(ENOMEM);
|
||||
}
|
||||
|
||||
/* Allocate memory for colors */
|
||||
sub->rects[rect]->nb_colors = 256;
|
||||
sub->rects[rect]->pict.data[1] = av_mallocz(AVPALETTE_SIZE);
|
||||
if (!ctx->forced_subs_only || ctx->presentation.objects[i].composition_flag & 0x40)
|
||||
memcpy(sub->rects[i]->pict.data[1], palette->clut, sub->rects[i]->nb_colors * sizeof(uint32_t));
|
||||
|
||||
/* Copy the forced flag */
|
||||
sub->rects[rect]->flags = (ctx->presentation.objects[rect].composition & 0x40) != 0 ? AV_SUBTITLE_FLAG_FORCED : 0;
|
||||
|
||||
if (!ctx->forced_subs_only || ctx->presentation.objects[rect].composition & 0x40)
|
||||
memcpy(sub->rects[rect]->pict.data[1], ctx->clut, sub->rects[rect]->nb_colors * sizeof(uint32_t));
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
@ -511,10 +630,10 @@ static int decode(AVCodecContext *avctx, void *data, int *data_size,
|
||||
ret = parse_palette_segment(avctx, buf, segment_length);
|
||||
break;
|
||||
case OBJECT_SEGMENT:
|
||||
ret = parse_picture_segment(avctx, buf, segment_length);
|
||||
ret = parse_object_segment(avctx, buf, segment_length);
|
||||
break;
|
||||
case PRESENTATION_SEGMENT:
|
||||
ret = parse_presentation_segment(avctx, buf, segment_length, sub->pts);
|
||||
ret = parse_presentation_segment(avctx, buf, segment_length, avpkt->pts);
|
||||
break;
|
||||
case WINDOW_SEGMENT:
|
||||
/*
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user