Partial rewrite stream probe code.

[ffmpeg] / libavformat / anm.c

diff --git a/libavformat/anm.c b/libavformat/anm.c
index de59b40675512ee90618c6785df825629568c4f6..269e325e429b8cc329c6ffebd1dc35cd9b1db16b 100644 (file)
--- a/libavformat/anm.c
+++ b/libavformat/anm.c
@@ -20,7 +20,7 @@
  */
 
 /**
- * @file libavformat/anm.c
+ * @file
  * Deluxe Paint Animation demuxer
  */
 
@@ -34,13 +34,13 @@ typedef struct {
 } Page;
 
 typedef struct {
-    unsigned int nb_pages;    /** total pages in file */
-    unsigned int nb_records;  /** total records in file */
+    unsigned int nb_pages;    /**< total pages in file */
+    unsigned int nb_records;  /**< total records in file */
     int page_table_offset;
-#define MAX_PAGES  256        /** Deluxe Paint hardcoded value */
-    Page pt[MAX_PAGES];       /** page table */
-    int page;                 /** current page (or AVERROR_xxx code) */
-    int record;               /** current record (with in page) */
+#define MAX_PAGES  256        /**< Deluxe Paint hardcoded value */
+    Page pt[MAX_PAGES];       /**< page table */
+    int page;                 /**< current page (or AVERROR_xxx code) */
+    int record;               /**< current record (with in page) */
 } AnmDemuxContext;
 
 #define LPF_TAG  MKTAG('L','P','F',' ')
@@ -79,21 +79,21 @@ static int read_header(AVFormatContext *s,
                        AVFormatParameters *ap)
 {
     AnmDemuxContext *anm = s->priv_data;
-    ByteIOContext *pb = s->pb;
+    AVIOContext *pb = s->pb;
     AVStream *st;
     int i, ret;
 
-    url_fskip(pb, 4); /* magic number */
-    if (get_le16(pb) != MAX_PAGES) {
+    avio_skip(pb, 4); /* magic number */
+    if (avio_rl16(pb) != MAX_PAGES) {
         av_log_ask_for_sample(s, "max_pages != " AV_STRINGIFY(MAX_PAGES) "\n");
         return AVERROR_INVALIDDATA;
     }
 
-    anm->nb_pages   = get_le16(pb);
-    anm->nb_records = get_le32(pb);
-    url_fskip(pb, 2); /* max records per page */
-    anm->page_table_offset = get_le16(pb);
-    if (get_le32(pb) != ANIM_TAG)
+    anm->nb_pages   = avio_rl16(pb);
+    anm->nb_records = avio_rl32(pb);
+    avio_skip(pb, 2); /* max records per page */
+    anm->page_table_offset = avio_rl16(pb);
+    if (avio_rl32(pb) != ANIM_TAG)
         return AVERROR_INVALIDDATA;
 
     /* video stream */
@@ -103,33 +103,33 @@ static int read_header(AVFormatContext *s,
     st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
     st->codec->codec_id   = CODEC_ID_ANM;
     st->codec->codec_tag  = 0; /* no fourcc */
-    st->codec->width      = get_le16(pb);
-    st->codec->height     = get_le16(pb);
-    if (get_byte(pb) != 0)
+    st->codec->width      = avio_rl16(pb);
+    st->codec->height     = avio_rl16(pb);
+    if (avio_r8(pb) != 0)
         goto invalid;
-    url_fskip(pb, 1); /* frame rate multiplier info */
+    avio_skip(pb, 1); /* frame rate multiplier info */
 
     /* ignore last delta record (used for looping) */
-    if (get_byte(pb))  /* has_last_delta */
+    if (avio_r8(pb))  /* has_last_delta */
         anm->nb_records = FFMAX(anm->nb_records - 1, 0);
 
-    url_fskip(pb, 1); /* last_delta_valid */
+    avio_skip(pb, 1); /* last_delta_valid */
 
-    if (get_byte(pb) != 0)
+    if (avio_r8(pb) != 0)
         goto invalid;
 
-    if (get_byte(pb) != 1)
+    if (avio_r8(pb) != 1)
         goto invalid;
 
-    url_fskip(pb, 1); /* other recs per frame */
+    avio_skip(pb, 1); /* other recs per frame */
 
-    if (get_byte(pb) != 1)
+    if (avio_r8(pb) != 1)
         goto invalid;
 
-    url_fskip(pb, 32); /* record_types */
-    st->nb_frames = get_le32(pb);
-    av_set_pts_info(st, 64, 1, get_le16(pb));
-    url_fskip(pb, 58);
+    avio_skip(pb, 32); /* record_types */
+    st->nb_frames = avio_rl32(pb);
+    av_set_pts_info(st, 64, 1, avio_rl16(pb));
+    avio_skip(pb, 58);
 
     /* color cycling and palette data */
     st->codec->extradata_size = 16*8 + 4*256;
@@ -138,20 +138,20 @@ static int read_header(AVFormatContext *s,
         ret = AVERROR(ENOMEM);
         goto close_and_return;
     }
-    ret = get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
+    ret = avio_read(pb, st->codec->extradata, st->codec->extradata_size);
     if (ret < 0)
         goto close_and_return;
 
     /* read page table */
-    ret = url_fseek(pb, anm->page_table_offset, SEEK_SET);
+    ret = avio_seek(pb, anm->page_table_offset, SEEK_SET);
     if (ret < 0)
         goto close_and_return;
 
     for (i = 0; i < MAX_PAGES; i++) {
         Page *p = &anm->pt[i];
-        p->base_record = get_le16(pb);
-        p->nb_records  = get_le16(pb);
-        p->size        = get_le16(pb);
+        p->base_record = avio_rl16(pb);
+        p->nb_records  = avio_rl16(pb);
+        p->size        = avio_rl16(pb);
     }
 
     /* find page of first frame */
@@ -177,7 +177,7 @@ static int read_packet(AVFormatContext *s,
                        AVPacket *pkt)
 {
     AnmDemuxContext *anm = s->priv_data;
-    ByteIOContext *pb = s->pb;
+    AVIOContext *pb = s->pb;
     Page *p;
     int tmp, record_size;
 
@@ -192,8 +192,8 @@ repeat:
 
     /* parse page header */
     if (anm->record < 0) {
-        url_fseek(pb, anm->page_table_offset + MAX_PAGES*6 + (anm->page<<16), SEEK_SET);
-        url_fskip(pb, 8 + 2*p->nb_records);
+        avio_seek(pb, anm->page_table_offset + MAX_PAGES*6 + (anm->page<<16), SEEK_SET);
+        avio_skip(pb, 8 + 2*p->nb_records);
         anm->record = 0;
     }
 
@@ -208,11 +208,11 @@ repeat:
     }
 
     /* fetch record size */
-    tmp = url_ftell(pb);
-    url_fseek(pb, anm->page_table_offset + MAX_PAGES*6 + (anm->page<<16) +
+    tmp = avio_tell(pb);
+    avio_seek(pb, anm->page_table_offset + MAX_PAGES*6 + (anm->page<<16) +
               8 + anm->record * 2, SEEK_SET);
-    record_size = get_le16(pb);
-    url_fseek(pb, tmp, SEEK_SET);
+    record_size = avio_rl16(pb);
+    avio_seek(pb, tmp, SEEK_SET);
 
     /* fetch record */
     pkt->size = av_get_packet(s->pb, pkt, record_size);
@@ -225,7 +225,7 @@ repeat:
     return 0;
 }
 
-AVInputFormat anm_demuxer = {
+AVInputFormat ff_anm_demuxer = {
     "anm",
     NULL_IF_CONFIG_SMALL("Deluxe Paint Animation"),
     sizeof(AnmDemuxContext),